Amy Diehl, Ph.D.Nov 12, 2022
Here's a Mastodon tool to search for users by name across instances. It also returns Twitter accounts in the results.
https://search.noc.social

Show threadTokyo Sand Nov 13, 2022
@amydiehl What does it mean if it’s not finding my own handle? On here or Twitter?
Show threadAmy Diehl, Ph.D.Nov 13, 2022
@dhstokyo The data is cached so if your account was recently created, it may take a bit for it to show up in the search results.
Show threadTokyo Sand 
@amydiehl Ah, thanks. I’m not new to Twitter, but am new to Mastodon.
Nov 13, 2022 at 5:35amWeb