It would also be interesting to know exactly what has happened. If you had all those styles before and they were found by BIAB2023. Have they then been removed by the BIAB2024 installation or can't the BIAB2024 installation find them.

I don't think one can trust the "What add ons do you have" at all. I have several styles missing but when checking with the
"What add ons do you have" I have all RT installed and I do not miss any RT pack. To me it looks like that if the "What add ons do you have" functions find any style that belongs to an RT pack it marks that pack as available (only a guess I don't know, but I don't think I can't trust the information to be correct).