https://www.linuxuprising.com/2019/04/how-to-enable-hidpi-fractional-scaling.html

Wayland
gsettings set org.gnome.mutter experimental-features "['scale-monitor-framebuffer']"

X11
gsettings set org.gnome.mutter experimental-features "['x11-randr-fractional-scaling']"

remove
gsettings reset org.gnome.mutter experimental-features