FLStudio 20.0.05 on Windows 10 Desktop (10.0.17134) - I have tried both the 64 and 32 bit versions of FLStudio 20.
FlStudio Mobile 3.2.04 on Android (Moto G6 with Android 8.0.0).
FLStudio Mobile plugin 3.1.941 in FL ...
FLStudio Mobile after saving to my device.
Unless I'm missing over something, the app itself has no option to simply open an FLM file, it appears to only be able to open what's saved within the program ...