I have the same issue with other "Airplay" devices that are not from Apple.
Apple of late seem to have a total disregard for their customers, releasing buggy software with so many things broken/missing or just not backward compatible.
Getting really hard to stay with Apple after being a loyal customer for over 25 years. this issue is not acceptable for me as I literarily just purchased a AIRPLAY projector for my bedroom a few months ago that I cannot use now.
I will probably downgrade, and due to not being able to downgrade my 1st gen Apple watch I will stop using it and look into another brand for my fitness tracking needs. as not prepared to stop being able to use a brand new projector or have run cables all around my bedroom. just because Apple thinks it is acceptable to break compatibility and not make their updates backward compatible.