“We’re aware of reports that access to Signal has been blocked in some countries,” Signal says. If you are affected by the blocks, the company recommends turning on its censorship circumvention feature. (NetBlocks reports that this feature lets Signal “remain usable” in Russia.)
I find these absolutist arguments particularly hilarious in face of UK now actively talking about restricting social media, and arresting people for posts. When people use media to incite violence and social unrest in countries the west considers to be adversaries, free speech stands above all other considerations. However, as soon as these things start happening in the west, then the restrictions on speech are immediately put into place.