I remembered a similar thread, maybe it will help:
It’s for P3D, maybe it works for P2D on android as well? The solution was to set “textSize” to the largest text size in setup(): (textSize 128)
I’ve also encountered the issue that the font size (or possibly the kerning?) was a bit different between OS’es, unless set specifically with “textSize()”. I only tried it on Linux and Windows.