Double-clicking an image in Bridge opens Adobe Camera Raw, but there is no ACR interface. Right-clicking an image in Bridge does open ACR correctly. I am using Photoshop 2020 on a Macintosh. All apps are up to date.
Do you have multiple monitors? Or, have you had multiple monitors in the past, and are you not using two monitors now? Try connecting to an external monitor and opening Camera RAW, then moving the window to your main window. Quit Bridge, and see if you can open Camera RAW with no external monitor attached.