Thank you for your post. Having two SF30 pro and got the same issue.
After configuring as per you post above, the mapping is strange. For example, the hotkey is used to jump under tomb raider.
In other words, the controller map is not as per lib-retro "standard" for psx. Any idea how to be back on standard lib retro mapping ?
My config : retropie 4.7.3 / pi 4
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first