Managed to get PSP emulation working on the Librem 5!
git clone --recurse-submodules https://github.com/hrydgard/ppsspp.git
sudo apt install clang cmake libgl1-mesa-dev libsdl2-dev libvulkan-dev
vi cmake/Toolchains/raspberry.armv8.cmake (add set(PPSSPP_PI_MODEL4 ON))
https://wololo.net/downloads/index.php/download/1326 running on the L5:
@hamner Awesome work! How's the performance looking?
@hamner nice! Did you use an external controller or are there on-screen touch controls for that emulator?
@hamner Way to go! Do you know if there has been any progress from the community on running Android apps through anbox or another emulator on the L5?