I'm sure this has been answered but I can't find it.
I have BIAB 2022 on a PC. I'm planning to switch to a MAC (I own BIAB for Mac 2021). Can I use the new styles that came with 2022 in my BIAB for Mac?

Since the Mac version is currently 2021, the styles for the 2022 version would not be compatible. Once the 2022 for Mac comes out, then you can copy the contents of the Windows Styles folder to the Mac Styles folder. Then as long as your Mac version has the same RealTracks as what your Windows version had, you can use those Styles.