You can tell when Apple abandons its efforts in some of its apps, because options stagnate even when they’re confusing or don’t meet people’s needs. Photos for macOS is full of dead ends and half-working pieces, even if the overall app generally meets the need for photo organization and syncing across iCloud. Printing is one such area.
iPhoto (the previous photo-organiztion app) had richer options than Photos has ever had. That surely reflects reality: fewer people now than during iPhoto’s heyday print their pictures. Mostly, people post them online, use online photo services where they receive pictures via the mail, or use a local store for printing and pick up. (The promise of home photo printing was overwhelmed by the supplies we needed, the time it took, and the cost involved!)