This isn't a bug, but just a small UI recommendation. I have MX Keys and MX Master, both show up perfectly fine, but on the device selection screen, the mouse is shown on the left and the keyboard is on the right. It's seems kind of wrong to have them in different positions to how they are on a desk.

A small update to position them automatically based on device (which could get complicated when adding multiple types of devices), or a manual mode (drag and drop).

I know it's not really an issue, just a little jarring to look at (I do UI design for work). Other than that, this new Options+ feels way less clunky compared to the old Options. Well done!