Accessing raw ip addr add options with NetworkManager

Is it possible to access other options of the ip command from NetworkManager. I have a configuration where I create a peer link

ip addr add 123.456.78.9 dev eno1 peer 123.456.78.15

where the rest of 123.456.78.0/28 needs to go out of another NIC. A /28 is too small to want to subnet.

This is easy to do using the ip command and years ago I used to patch ifup to accept a PEER option, then I got lazy and just added the ip command to rc.local, but it would be nice to have it managed by NetworkManager if that's managing all the rest of my network settings.