Maybe this have changed over the years, and I rarely if ever used these combinations to switch to TTY except for emergency (OOM, or window manager breakage), but on every Linux system I ever used, graphical mode was on (Ctrl+Alt+)F7.

Using CachyOS right now, gdm/mutter/gnome ended up on Ctrl+Alt+F1, I can't remember if it was crunchbang or some other older distribution, but been others too using various numbers. I agree F7 is most common though.