For the nvidia card to output something from the virtual machine I had to, of course install the proper drivers but before that I had to enable secure boot, or at least...
For Red Hat Enterprise Linux dnf install dnf-utils needs-restarting -r echo $? 0 = no reboot1 = reboot virt-manager -c 'qemu+ssh://myuser@10.11.12.13:12345/system?keyfile=id_rsa'