Scaling above 125% is not available in Gnome Control Center for displays with small screen resolution (720x1280, 800x1280)
Hello!
Previous issue in Mutter bugtracker: mutter#565 (closed)
With Gnome Shell 3.34.0 scaling setting became available for displays with screen resolution such as 720x1280 (GPD Win 2, GOLE F1, etc.) and 800x1280 (Dell Venue 8 Pro 5855, HP Stream 7 Tablet, Lenovo Miix2 8, etc.) however there is only two options: 100% and 125%. Unfortunately, as I find in practice 125% is still too small for screens for such size. Changing scale value from 1.25 to 1.5/1.6/1.75 (depends on screen size and resolution) in monitors.xml makes these devices usable. It would be nice if at least 150% and 175% would be available via GUI in Gnome Control Center.