Just tested, and GRUB_GFXMODE=auto does equate to GRUB_GFXMODE=2560x1440 for me (my native display resolution), so it’s functioning as it should. This means that by default, Red Hat must merely set GRUB_GFXMODE as 1080x720 (or similar). All that remains is to have it scale.
It doesn’t. I forgot to rebuild GRUB. I still have to hard-code GRUB_GFXMODE=2560x1440.
@litemotiv, do any guides exist to make that process easier? I can’t imagine that generating a font file is a trivial endeavour. I’d rather like to use enlarged Noto Mono if possible, but grub requirements for fonts is making me reconsider trying this altogether.