How to install ppsspp on LibreELEC RR and Raspberry 4?

[jaybee01]

Hello all. The documentation for LibreELEC Retroarch version says the ppsspp emulatoris included, but on my version on Raspberry 4 it is not. How can I add it please, or how can I install ppsspp standalone version so it runs when LibreELEC is switched to Rateroarch or Pegasus mode?

Thanks, Jan