I can't contribute much. Futo Keyboard is nice for android. Speech Note is a tool for linux that I use from time to time... It is a bit slow without GPU acceleration and the resulting text are about 95% correct.

Have you read this comparison? https://openwhispr.com/blog/best-dictation-tools-linux-2026... It smells a bit like advertising for openwhispr but contains some pointers.

https://m.youtube.com/watch?v=5d_jGOGRSMc&t=16m55s. After a while of talking he mentions KDE connect remote input which could be used with futo keyboard dictation, I guess?