Texts for mobile is tricky.
Some folks recommend using font size 16 or above.
Prevent your users from zooming in apple devices in settings/general/IOSappearance
Set the height of your texts considering the size of the font, the number of lines you expect in the text elements, the line setting in styles (1 or higher … depends on the height of your text element), and play around with the responsive settings “cut content if too tall” and “shrink if text gets shorter”