Need help with digital controller overlay with rewind button

How do I get custom digital controller overlays with a rewind button for my android retroarch? (using samsung galaxy phone). I enabled rewind but when I try to set the rewind button hotkey the digital controller doesn’t show up for me to press a button. Then tried switching the ‘Overlay Preset’ but there was only 1 other overlay I could choose and it didn’t change the digital controller for me. I saw this picture of a different digital controller, but don’t know how to get and use it.

Can someone please explain exactly what I need to do to use a different digital controller with working rewind button, please and thank you.

Can anyone please help me?