With these companies now saying do not upgrade the OS I fully understand why PG Music has said nothing about BiaB Mac 2019. It will be interesting to see if any other type of software companies come out with similar announcements.
M1 iMac 24” 2021 - Monterey 12.0.1

BiaB UltraPak+ 2021 Mac, (515) + pretty much everything extra.
Yamaha SLG200N - Nektar Impact LX49+ - Logic Pro X - 10.7.1