SideCar Inop, Big Sur Public Release 11.01

I have the same problem. This setup worked with sidecar before upgrading to Big Sur.

iPad Pro 12.9 4th gen [14.2] with MacBook Pro 13 2018 [11.0.1]

Click on the Control Centre then click Display icon near the brightness slider then your iPad should show up. You can also click Sidecar Preferences.

I have the same problem. Both my MacBook Pro (16 inch 2020) and Mac Mini (2020) shows "Device Timed Out" whenever I try to sidecar into my iPad Pro (2019).

I have same problem. Sidecar stop working with my iPadPro 11 and MacBook Pro 13 2017 ( macOS Big Sur 11.0.1

I was getting so frustrated with this issue too. But I somehow managed to get my iPad (Pro) to finally show up on my MacBook Pro (macOS Big Sur 11.0.1)!

1) Restart Macbook
2) On iPad, go to Bluetooth Settings, click on MacBook Pro, and then Forget Device
3) On Macbook, go to Bluetooth Settings and remove the iPad by clicking the x on the right side when you hover over iPad. iPad will disappear from the Devices list, but should shortly reappear with the “Connect” button
5) On iPad Bluetooth Settings, your MacBook Pro should also now show up under Other Devices. Click on it, and you should get a Connection Request pop up on your MacBook Pro. Click Connect.
6) iPad should now show up available to connect using either:

• Display options from the Menu Bar

• Sidecar Preferences or

• Display Preferences

Good luck!!