The App is been build last time in 2015: https://f-droid.org/en/packages/org.ppsspp.ppsspp/
I cant find any discussion about this app here:
https://forum.f-droid.org/search?q=ppsspp
There is a report about not being updated from 2016: https://forums.ppsspp.org/showthread.php?tid=20873
The releases are tagged correctly in the project: https://github.com/hrydgard/ppsspp/releases
There was a try to update it here, but the build process was using an outdated build (not gradle based) : https://gitlab.com/fdroid/fdroiddata/-/issues/1030
Would be great if the version is updated 