Hi! What you are nominating is actually a wayspot, not a pokestop. If it is accepted, it gets added to “Lightship”. Each of Niantic’s games has their own inclusion rules - Pokemon Go has never been officially confirmed, but it is usually 1 stop it gym per level 17 S2 cell.
If the ones you nominated are close to any other Pokestop, the chances are it shares a call so can’t go into that game - sorry!