The new privacy rules don't apply to the uk/Europe.
The likely change in UK privacy regulations now that we're out of EU might lead to UK data being treated more loosely. Google and FB have moved UK user data to US datacentres so it's subject to US "laws", since WA is owned by FB...
How long before FB messenger, WA, etc are also subject to the same laws that annihilated Backpage as a punting/sex contact forum?
I'm moving to Signal for both RL and punting. Reverting to SMS for those who don't join the migration isn't going to be a problem as it will stop me sending TikToks and killing the planet with too much data consumption (and I have to account for my increased porn consumption during lockdown, as if I could watch more porn).