My handoff/airplay devices are iPone 12 Pro (IOS 14.2.1), iPhone X(iOS 14.2), M1 MacBook Pro 2020 (Big Sur 11.0.1) and apple watch series 5.  iPhone 12 Pro and iPhone X can detect handoff from each other;But they both can't detect handoff from MacBook Pro(Big Sur 11.0.1).  I've tried all troubleshooting in all devices.