Even if you're self-hosting, you still have to send your data to any instance hosting posts or comments you're interacting with, otherwise you'll be the only person to ever see your own posts and comments.
No other instance will be guaranteed to have a complete profile of you, though.
Even if you're self-hosting, you still have to send your data to any instance hosting posts or comments you're interacting with, otherwise you'll be the only person to ever see your own posts and comments.
No other instance will be guaranteed to have a complete profile of you, though.