@tchambers Yes I think so. For sure you need 1 initial follower to create the account.
As far as I know, the bridge could be working OK and could be normal that you only see new episodes when they are released.
To check if the bridge it's working (or maybe too to create a new account bridged), you can/have to create a new public toot with just:
@1026613 latest
(for instance).
And after that, you get a toot from that account with the latest episode, the bridge it's working.
On the picture attached, "Search Engine" account it's created since 2023 and has 42 messages (that I cannot see, because I didn't follow the account).
So if the problem it's that there is no info on the profile, the command "latest" or "rescan" can help.
If the "problem" it's to expect that bridge account list all the episodes as toots, that just how bridge it's coded and could be working OK. That's my assumption given that I launch the "latest" command and it worked.
Or I could be misreading your toots, and I'm missing something about your question.