Slow gameplay on high-end phone, setting changes don't help

[MCBPS]

Just got my brand new Pixel 4 XL a few days ago (after my 3 XL died last month :/) and started setting up PPSSPP on it for all my favorite PSP games. Loading up Shaun White Snowboarding though, I realized I'm getting only about 30-50% speed and 14-28/60 frames on the game. I tried disabling any intensive options, turning down the details, and changing to 1x PSP/Display res (from 2x) but nothing is improving my speed or FPS. It seems like there's some hard limit forcing my phone to go slower than it can handle. Does anybody have a potential solution I can try out?