“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 don't think anyone took those seriously as private messengers. On another note, I think Maduro cracked down on WhatsApp as well, and called Venezuelans to cancel Meta altogether. Or something.