“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.)
tiktok is a platform to share information and communicate, yes
which is why the french government banned it in Kanaky ("new caledonia") during the protests there, as it was a tool of communication used by the protesters