Thereis a good article here on enabling fractional.scaling in Gnome.
In GNOME 3.32, the developers have added an “experimental” support for fractional scaling. Sadly, there’s no option to enable that one in the control center, so you’ll have to apply the following command in the terminal to enable it:
gsettings set org.gnome.mutter experimental-features “[‘x11-randr-fractional-scaling’]”
https://fosspost.org/fractional-scaling-between-windows-linux/