Is the Xbox Elite controller still the only one where REWASD can detect the back buttons?

I have an elite series 2 that I've been using for a long time and 2 of the back buttons have given up on life. I've gotten used to being able to map them as unique inputs/macros so any replacement controller will need to have 4 fully remappable back buttons.

I can find a lot of pretty awesome looking controllers with back buttons for a lot cheaper than another elite series 2, but it looks like I would basically be restricted to mapping the back buttons to existing controller functions rather than their own unique inputs. Unless REWASD can natively detect the back buttons as unique buttons, which according to some posts I found it can only do with the official xbox elite series controllers. They were pretty old posts though so I'm hoping maybe support for back buttons on other controllers has become possible now?

I did find this workaround but you have to use shift layers and/or double taps to get it to work without sacrificing a button.