On your github README the screen shows default font options to choose from, but on the actual software it is missing as well as in the screen that you have on your website
I don't know any other software which could work with font settings under wlroots, so It would be nice to see it back.
Sorry, it turns out you can choose a default font in the GTK theme settings menu, I will try rebooting, if settings will persist I will close the issue
On your github README the screen shows default font options to choose from, but on the actual software it is missing as well as in the screen that you have on your website I don't know any other software which could work with font settings under wlroots, so It would be nice to see it back.