Sometimes your matches don't have photos on their profile yet. It could be they just haven't gotten around to it or they might need a little nudge of encouragement.
Send a photo request by visiting the profile of your match and click/tap Ask for photo. You can also request one directly via your Matches list.
Your match will receive a notification of your request. Once your match uploads a photo to their profile, you will receive a notification.
New photos are not sent directly to you. Please visit your match's profile and view their gallery.