It should be in Photo 2 sometime after it's added to the Lensfun database
In the meantime it may have already been added to Lensfun but not yet picked up by Serif, and if so you can download the XML file from Lensfun and add it yourself to either Photo or Photo 2, in the directory listed in the application Settings.
If it's not yet supported by Lensfun, there's info on their site about how to participate and produce profiles yourself, or help them to produce them.
A better overall approach instead of using lensfun would be, to use directly the supplied Nikon corrections stored in the raw image themself, so something which C1 does and now even darktable seems to do so, in order to support all Nikon Z-mount lenses.
