There was old guidance that pools were ineligible, but I think they have made it clear that they are acceptable now.
You could try submitting again (be sure to take your own photos) and include that link in the supporting information. Or you could appeal the rejection. You get two appeals on a 20 day timer each. If you aren’t seeing the appeal option right now, you may have to wait. You can ask for our advice on that nomination if you want to.