@laurenshof Nope.
Current steps:
Search for a threads.net account from your fediverse app.
Like it or reply to it.
Go back to Threads and find that post
Open up the "Fediverse Users Liked your Post" section
Find your account, open the profile, click Follow.
Other users are starting to provide direct links to their fediverse accounts and that seems to work, too. But you can't just search for `box464@mastodon.social` in threads.
Here's yours!
https://www.threads.net/fediverse_profile/laurenshof@indieweb.social