Bulb and pre-2021 plugs cannot be re-added

No,
Until they fix it, or, get sued and fix it, the only option is to install a much older app, then add your devices.
Then, re-install newer app again and hope the older devices don’t get reset.

They have got to fix the current apps.
Notice the lack of official response here and on the other posts.

I like the one where advice is given on preparing for a lawsuit.
Class action anyone?