Lemmy instances won’t search outside of their own databases if you’re not logged in.
But if you are, what it does can be recreated on a command-line by doing: curl --header ‘accept: application/json’ https://nerdica.net/.well-known/webfinger?resource=acct:[email protected] | jq .
edit: However if you webfinger your mostr.pub account, you get: {“error”:“Invalid host”} so any ActivityPub instances will only ever be able to find you if you’ve interacted with them in some way to get a database entry. Edit: also, I tried to do this again, thought I’d try the npub1 account as well, but got Gateway Timeouts, so there’s a bit of jankiness going on too.