I have the source code here:
https://gitlab.com/rachels-conlangs/toki-pona-pal
Don't think I have the APK, would have to rebuild it.
Found it?
https://apkpure.com/toki-pona-pal/com.Moosader.TokiPonaPal
I just installed this on my phone: OxygenOS 14 (I think that's Android 14)
Phone is a One+ Nord
It complained about maybe not working right and have security updates but it opened fine.