It works the UI is just broken / it installs ifupdown2 by default
auto lo
iface lo inet loopback
iface enp7s0f0 inet manual
iface enp7s0f1 inet manual
iface enp6s0f0 inet manual
iface enp6s0f1 inet manual
iface enp2s0f1 inet manual
iface enp2s0f0 inet manual
auto bond0
iface bond0...