Big tech is eventually going to comply, because they have too much to lose. It will happen.
People need to stop relying on "big" tech, and IMHO one really import thing they can/should do is free themselves from having to rely on big tech's software repositories. The two highest-profile examples of that are the Apple and Google app stores for their mobile OSes. (But desktop Linux users, you might have noticed how your situation eerily resembles the centralized distribution commonly used by mobile users.)
Nobody except politicians (who want to buy eyeballs, since controlling media means you get to control votes) probably cares about TikTok. Nevertheless the recent drama with TikTok shows how the US government intends to control people: ban companies from having certain things in their repos. The TikTok story is interesting for that alone.
We need to find some way to condition users into using independent repos, so that secure communications don't get effectively (if not technically) banned. The current trajectory looks like some day, you're going to either have to "sideload" Signal, or learn to do without.