“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 kinda disagree - that’s not to say that they don’t usually do so for illegitimate reasons (or that these bans are legitimate), but there’s plenty of valid reasons why a government would want/need to ban a platform
X, for example, has been giving the UK a whole lot of good reasons why they may wish to consider it (restoring the accounts of people like Tommy Robinson, allowing misinformation, the owner of the platform himself actively spreading that misinformation)