Just upgraded M1 Macbook Air to Monterey 12.3. Handover, Sidecar and Universal Control aren't working.

Hey guys - as I said in the title, just updated to Monterey 12.3 on my Macbook Air M1 and to iPadOS 15.4 on iPad 9. iPad can detect the Macbook and mirror its screen, Macbook on the other hand can't detect iPad at all unless they're plugged into each other - in which case Universal Control and Handover don't work, only Sidecar does.

Both devices are on the same WiFi, Bluetooth is on and logged into the same iCloud account.

How do I fix this?

Just a side note Sidecar and Handover were working fine before the update.