No, you don’t have to interact with Meta. Websites that utilize Facebook ads in some fashion will install a Meta Pixel to their site in order to track users and better target their ads. That information can be correlated to others in the same household extremely easily.
You can read about the specifics of how Meta does it in their developer information here: https://developers.facebook.com/docs/meta-pixel/
There may some breaks in that armor if you look at their recent actions that sound a lot like Musk speaking through them.