Have you joined the Cemeterist Project?
https://www.wikitree.com/wiki/Project:Cemeterist#How_to_Join
https://www.wikitree.com/g2g/1678634/join-the-cemeterist-project-preserving-our-ancestors-legacy sign up here.
https://www.wikitree.com/wiki/Space:Getting_Started_as_a_Cemeterist
You can create a Free Space for the photos.
It works like adding a new profile.
Under add on the top right of your profile you will see add a New Free space, click there, number 4 is create a free space, in the spaces enter the information requested.
If all your photos are from the same cemetery, you can call the space ABC cemetery photos. Or if the pictures are from more than one cemetery, you could call the space E Childs cemetery photos.
Under location, enter where the cemetery is located.
You can add a start date if you want to,
Then in the text space you could add, something like ' this space contains photos from ABC cemetery or various cemeteries', or you can leave it blank
Then click Create this new profile.
The Free Space will be included on your watchlist, at the top under Free Space profiles.
Next step upload your headstone photos to the free space being sure to complete all the sections of form.
Photos should also be saved to the profile of the deceased people.
If you need more help you can ask for how to info on the sign up post, at the top of this answer
