It is not true that Finale is not working with Sequoia. Try yourself.

https://www.finalemusic.com/blog/macos-sequoia-incompatible-with-finale-v27/

Still works fine!

The first builds of Sequoia had a MAJOR issue with corrupted Permissions. Not supporting Sequoia, still in Beta last August was the right move. I'd complain but I did quite well helping Apple fix it.

All better now. macOS 15.3 fixed a few minor but very annoying bugs introduced with 15.2. It doesn't appear that MM Support will change their Sequoia policy but there's no reason for it anymore.