Not sure they can do anything - since I discovered federated platforms and started using more FOSS and non-corporate technology in my life, I am really glad to break away from it all.
I'm still on some platforms I'd rather not be (Discord), but the unfortunate truth of social platforms is that you have to be on them to socialise with certain friends/family, and encouraging people to use something different to talk to you is a non-starter for many.