MBP 13 (2020) sidecar problems

[F1992C]

Hey everyone! I'm recently experiencing problems with Sidecar. I've just bought an IPad Air. I immediately tried sidecar with my MBP 13 (2020) and it worked perfectly. After a week or so I wanted to work with it again, but I couldn't. The IPad doesn't show up. I've checked all the requirements and everything is all right: same wifi, iCloud, handoff etc. It only works when I connect the two devices with a cable. Of course, I've tried restarting them: nothing changed. Bluetooth is working and the two devices are correctly connected. Has anyone had the same issue or knows how to settle it?

Thanks in advance!