Are you using any workarounds or other solutions to achieve your goals in Capture One?
Yes, I have creates a style called Only B/w and one of the items to paste is a one star rating, so in this way when I have to select, I do it choosing "one star rate"
Main menu > Select > Select by same > Variant position.
Which means you would have to have the B/W variant always on the same position, but you would need that too for your feature request.