rule of thumb is never register with your name, always use throwaway emails and accounts. that way social media will never have leverage over you. threads app gathers more data than TikTok ( https://twitter.com/deepaksonar911/status/167674841107126681... )
Assume that these apps can deanonymize you. One would have to go to extreme lengths to not leak identity.
At least I try not to be the lowest hanging fruit in deanonimyzation problem