Rezky will be the first 20380 corvette, where Russian made textile materials will be used.
To be clear there is no reason why Russian companies couldn't have been making all the materials and equipment and systems their navy and armed forces needed... it is largely a case that when the Soviet Union was going they wanted everyone to contribute and to have jobs so things were spread across the country and the economic group, which was very generous of them but ended up biting them in the arse.
When the music stopped and everyone sat down most of Russias allies ran across to the other side of the room and sat with the enemy because they could see the enormous banquet that was laid out. (it is only now they realise that banquet is for the US and nobody else eats till the US has eating as much as it can and taken a single bite out of everything... even things it doesn't like so their underlings know their position).
This means Russia suddenly had to pay US dollars for products coming from Ukraine and Belarus and Georgia, and most eastern European countries didn't want to even talk to them let alone sell things to them... they thought the west would buy their crap at western prices and they will become rich.
The point is that most of the stuff they needed was not top secret but had features most makers starting from scratch didn't fully appreciate.
When there are bolts and nuts on the international market for 1 ruble a dozen it does not really make sense to set up an industry for billions of rubles to make them... unless you need something very specific because most countries can make bolts so it is too hard to sanction.
Sanctions, however, have made Russia realise quite a few things... first the west is at war with them and really want to hurt or kill them and crush their economy and make them suffer... second that it is only the west that is the problem and that the rest of the world is actually quite open and interested in trade and actually many countries have a lot of respect for the Soviet Union and Russia... countries that the soviets helped escape colonial occupation... helped... those countries did most of the work, but the Soviets helped... and Russia continues to help.. and third... that that table yonder is a myth that the west is not the american dream... the american dream isn't even for all americans... it is for the few and they are greedy and wont share. Jeff Bezos was worth 120 billion at one point... why does anyone need to control and hoard that much money... especially in a country where people are forced to live in trailer parks despite working several jobs...
It is clear the western dream does not work for the majority... it is like a lottery where one person wins big a few dozen others get a nice consolation prize and everyone else pays the money that those few receive... It is essentially a pyramid scheme... but most things are in business.
Back on topic, the good news is their new ship designs are modular so if they have all the components and production needed to make their corvettes now then that can be applied to their Frigates and destroyers and cruisers and aircraft carriers because the systems and components and equipment is all standardised.
With the really big ships there will be extra systems the smaller ships don't carry, like S-500 and perhaps laser based system to dazzle EO guided weapons or satellites or to shoot down targets at closer ranges... or heavier calibre guns like 152mm (which are known) and 203mm (which is my speculation), not to mention the propulsion for the larger ships being nuclear powered, and of course the AESA radars and sonar equipment on the bigger ships being much bigger and more capable.
It is only countries that are forced to via sanctions that bother producing everything they need for domestic consumption... North Korea and Iran and Cuba leap to mind and they pay an economic cost and a social cost for the gaps that creates for them... fortunately they can get things on the black market and now with BRICS they can buy things without needing US dollars... which I suspect made things much more expensive for them...
Making all your own stuff is expensive and it takes time, but western sanctions have made it necessary but for the Russian economy, when they want to sell Russian products over seas they don't need to scramble to find substitute material when a western manufacturer objects to their products being sold...
The sanctions cost western companies a lot of business at a time when they could probably use the work, but it also slowed Russian production while they developed alternatives, but the end result is that Russia is going to make all the stuff that the west sold to them and it will probably make it much cheaper and sell it to other countries for rather less than the west sells it for so they lost Russian business and now they will compete in the rest of the world with Russian products that should be every bit as good as theirs for a fraction of the price...
Sanctions backfire unless you take your time and make sure they are precisely targeted... but even then a smart victim of your bullying can still inflict pain on you like Putins food sanctions against the EU in response to the EUs sanctions against Russia... it revitalised the Russian food production industry and created a massive food export option for the rest of the world.
To this very moment, Russia used to import fireproof textiles for its navy ships.
More importantly did they check every single textile and then randomly check them... the test samples might have been up to spec but the material in the orders might have included rejected stock they sell to the Russians to make more money because they really don't care about Russians...
Corruption in the west is endemic... and they all do it... it is like drugs in sports... everyone else does it so you have to or you can't compete... it is like norwegian skiiers who have a schedule when they get sick so the medication they take that boosts their performance is out of their system by the time it comes to take drug tests...