Lots of things.
I'd start a YouTube channel to document my travel life, but Google.
I'd use LinkedIn to expand my professional network, but Micro$lop.
I'd join communities related to my hobbies that mostly exist in FB groups or subreddits, but, yeah.
There are also things I still do, although differently. Like using Google Maps to view detailed information about places, like accessibility, restaurant reviews etc. But I only do it through a browser, and I use CoMaps for navigation. Or banking apps, due to convenience. Or the GoPro Quik app so I can remotely control my GoPro when I mount it on the outside of my car. Or music streaming services.
Surveillance sucks, but I try to find compromises that I can live with when needed. I can live with some inconvenience, but to a degree.