sidecar

hello,

I've got a real problem with sidecar. I have a MacBook Air 2020 running Monterey and iPad 8th generation (iOS 15.1) (both should be compatible) to add as a second display but it won't work.

I don't even see the option to add a new screen neither in Sidecar nor in the mirroring option.

I've called assistance but it couldn't help.

Anybody have any idea why it's not working?

thanks in advance