JoJo

I know my friends name and surname and that must be more than enough.

I see. However; no.

You can put in their handle, with the domain they’ve signed up with

If you’re looking for more wider fuzzy search for that; mastodon 4.4 is gonna implement independent search services, meaning that search will be expanded beyond one server, and you can find new accounts on other servers just by keywords

They can’t force you to cough up a password though.

On iOS, holding the volume up and lock button long enough that the shutdown screens and whatnot start showing, will disable Face ID login and force the PIN to be entered on next unlock.