p Corey Henson has a perfectly reasonable request for iCloud Photo Sharing:
My family just returned from a vacation and we took over 1,800 photos between us.
I want to pare this monstrous quantity down to something reasonable for a slideshow, and figured the way to do that is to compile all the photos into one place and share that with the other photographers, and have them all “like” the ones to use in the slideshow.
However, Corey found that while people with access to the library can tap Like in iOS, there’s no way to sort the images or create a smart album in Photos for macOS.
The likes don’t even show up!
You’re missing nothing: Photos for iOS and macOS have slightly different features, and shared albums lack options that would let you reduce or sort the set.