There is a reading mode in firefox
Which also works on android
I know there are add-ons for brave/chrome that add this.
Only as far as I know the mobile version of brave on android does not support extensions, or at least the url brave://extensions/ returns a page error.
So how to add this on breave android?
Brave 1.77.97, Chromium 135.0.7049.84
Android 13