Android phone here and I’ve had the small font issue for a couple of weeks now.
Tried several browsers, still a problem
Quite often, extremely small print is the result of someone else posting a V E R Y long URL or an extremely large picture.
That forces your phone to fit everything in the screen, making everything smaller.
I use the Opera browser on my Samsung, it is very well suited for text-intensive sites like FR.
Touch the screen with two fingers, then spread them apart, and then lift them off the screen. The image will refresh, and the lines of text will wrap around so they don’t go off the screen, minimizing horizontal scrolling.