How to change controller mapping in Stadia 2K21 basketball?

For example, on defense, I often accidentally press L1 and then another button, which switches the defensive matchups (even though I didn’t mean to). I then need to pause the game and navigate to Matchups and manually toggle through to reset them.

I’d prefer to unmap the L1 "change matchups" function, or at least change the mapping to something that I’d be less likely to accidentally press.

How can I do this?