I find there is a space for improvement for TTS Engines available on F-Droid.
It would be ideal to make it possible to install MycroftAI Mimic3 GitHub - MycroftAI/mimic3: A fast local neural text to speech engine for Mycroft or Piper GitHub - rhasspy/piper: A fast, local neural text to speech system as the engine. I have been enjoying Mimic3 on desktop for months and it’s great. But on the phone, it doesn’t install even on Termux. I would love to work on that, but am curious how many people would want to fund such development.
Please post here or reach out privately if you want to see it happen and willing to chime in with funding.