Why does Airplay not work right for me since upgrading to Monterey?

I upgraded my Macbook Pro to Monterey and my Apple TV 4k to iOS 15 and now airplay seems to be all screwed up. I can sort of get airplay to work (but poorly and distorted() but when I try to quit I can't. I have to put the MacBook to sleep to disconnect. There used to be a way to turn it on or off from the toolbar. Also, From some apps like Youtube I could access airplay mirroring from within the app and so continue using the MacBook for other duties while watching an airplay on Apple TV. I can no longer do that. Is there some setting I have screwed up on the Macbook or the Apple TV???