As a user, if the non-profit advert to migrate to Fedi appeals to you, you can get your data from FB. I have received all my data from FB and deleted the account.
So the FB2Fedi.org website could facilitate all this jumping through hoops ( which incidentally, is the corral fence that keeps sheeple locked into FB ), ask about their interests, find a good instance for them, help them set up an account, & walk them through migrating their data to it, if not automate it.
