Default grub font size on a 14" notebook with either a 2k (WQHD) or 4k (UHD) display is small to very small, making it almost illegible unless you have 20/20 vision.
There was a thread on the forums that shows how to change the font, but having a fedora magazine article would be better.
Using a 24dpi font size works fine on my 14" ThinkPad with 2K display, but for my 14" ThinkPad with 4K display, using a 36dpi font was more suitable.