May I ask what device you were able to get it working on? I'm struggling to get it working on an RG353 device (which I think runs EmuELEC but I'm pretty new to this).
My device is RG351P , if you're not sure how to run ports the best tutorals are here: https://retrogamecorps.com/2020/11/12/guide-pico-8-on-retro-handhelds/