Command line options?

[LunaMoo]

Software rendering only became somewhat usable on powerful desktops with AMD release of Ryzen that basically doubled the core count forcing intel to do the same in their latest cpu's.

Mobiles - doesn't matter their core count - as expected from battery powered devices are just too slow and because some people used it by accident then complained for poor performance it was hidden in UI there, but you can still set it by manually editing ppsspp.ini and changing "SoftwareRenderer = False" to "SoftwareRenderer = True"(or adding it if it doesn't exist) under [Graphics].

It can only be useful for debugging some graphics glitches, maybe also for few emulators which might require it to display graphics, but it's always best to avoid double emulation and just use a native emulator instead especially on a platform like android which has a ton of native emulators that are simply superior to psp ones.