Big Sur - Logitech G15 Keyboard Windows Key Useless - Alternate Remap Option?

My faithful Logitech G15 Keyboard has been in use full-time since 2001. That said, Big Sur seems to totally ignore the Logitech G15 Windows Key(s). As long as I can remember, I've always remapped the bottom row to mirror the TKL Macbook Keyboard's bottom left row of fn, control, option, command - omitting the fn key as its a row of 3 (CTRL, Windows, alt).

It's made it challenging to do typical tasks, such as new tab (cmd+t), select all (ctrl+a) and quick-search (cmd+spacebar); it's also been an eye opener as to how much I rely on the command key. I have other keyboards, but this is my get down to business workhorse keyboard that I type most efficiently on.

Is there any Big Sur remap tool that will get the Windows Key on my G15 functional again? Works just fine pre-Big Sur update, and also works fine on PC. When I go to the shortcuts on the keyboard and click spotlight to see what its recognizing the windows key as, i.e. setting a replacement mapping for command+spacebar for spotlight search, hitting the windows key+spacebar isn't recognized.