The PokéStop was created and visible for a few days after approval, but then it disappeared.
I would like to know the reason why it was removed.
The cell rules were fully respected, but if this PokéStop was removed, I believe another already-approved point in the same cell (photo 3) should have appeared instead. However, it did not.
Are you sure the cell doesnt have any other wayspot that already turned pokestop/gym?
Considering it appear for few days and then go missing(! Still appear) the likely explanation is that it was reported by property owner. But you need to wait staff for more definite answer