Until someone doesn't care and puts up relays anyway and people use those. Its already playing out in reverse with the UK going after US companies despite the lack of jurisdiction so we'll see how it plays out.
Nostr was hit by that to with if I recall correctly nostr.build or another image host blocking the UK out of fear. And then people can just upload images elsewhere to allow UK citizens to see them.
Of course a decentralized platform is not immune entirely, but the magic is that the damage is contained to the effected relay. Which people could put proxy relays up for, aggregated relays, etc.
So lets say the default relays in amethyst all comply in the end and some russian rents a bullet proof vps and begins to offer an aggregator relay that combines them. Users add the relay and they are back. That means that Noste as a protocol is resillient. Your identity is not tied to a particular relay which makes it unenforcable, some clients connect over tor making it more unenforcable and its easy to setup proxies making it even more unenforcable.
Compare that to a platform that has a corporation behind it and centralized servers, or something like bluesky with to much centralized control and they get you on the central point of failure.
Nostr is as good as its going to get (until they find a way to do this even more decentral).
