Works fine on Pixel 2XL on Android Q, latest version of mobile Chrome.
It didn't seem to work on my tablet (samsung tab, few years old).
Thanks! (Even, if reasults aren't what we may have hoped for.)
Feel free to look through my code, I haven't touched it in a few months but does seem to work alright on Android. I had to change how the espeak files get loaded quite a bit.