Enable display scaling in virt-manager, disable automatic guest resizing, and then grow the window. Rather than increasing the resolution, it will just make everything bigger (and blurrier, but that’s unfortunately mostly unavoidable if you want the VM’s display bigger without the VM knowing that its display is bigger).
So when I do this the fonts are still very small. The resolution is still 1920 x 1080 and I am running on smaller laptop (ie Framebook 12, netbook, Asus 11.6" etc). The font is too small to comfortably read.
Is the answer that I have to choose between accessibility and non-fingerprintability?