Thank you so much! I think that takes care of the issue.
For things that aren’t able to have font size manually inputted, it is microscopically small. For instance, the “store notice” appears as an ill-placed purple stripe on desktop but is perfectly readable on mobile.
So my brother just helped me figure it out how to get it displayed properly, but he said that “Classic” needed to be converted to “Block” and then alter the settings to reset the fonts. He thinks there is corruption in the font code.