I'm having the same issue, I too have an Samsung Galaxy S8. When I start up the game I get this, tried it on a few versions and its all the same.
auto
Here is a picture of what it looks like.
Not sure about other models of Pi4 but the Pi 4 B with 8GBs OCed to 2Ghz handles PSP really great except like 1 game I found and it is playable it just looks bad lol Motor Storm Arctic something or other.