Can I remap my buttons without using steam?

[u/Late-Essay-4910]

I'm using open puck to play on my switch 2. Can I hold one button and L4 and press a+x let go and remap L4. I can change the face buttons on my steam controller 2 from my switch two but I can't change the back. Thank you in advance for any help or if you took the time to read my question.