Please look at this video: https://www.youtube....h?v=vOvP12-hDTg taken by Perseverance.
At 11:46 - 12:00, and at several other spots in the video, you can see a spherical object in the sky. Note that this object pans with the background as the camera pans, which tells me that the object is not dirt on the lens. It is an object in the sky. Some commentators have postulated that this object is Phobos (or Deimos). JPL has not commented, as far as I know.
I do not believe that the Martian moons would look dark when viewed from the surface in the Martian daylight because they can only be seen via reflected sunlight. Therefore, in the bright Martian daylight, a Martian moon should be brighter than the sky or not visible at all. But, I admit that I have never seen one of the moons from the surface of Mars, so I do not know for sure.
Someone here may have a better idea on how to determine the provenance of the object in the sky. What are your opinions?
Also, is anyone here able to analyze Phobos' orbit? It seems that we should be able to determine conclusively whether the object is one of the moons by plotting its orbit with respect to Jezero crater (18.38°N 77.58°E). I would think that just knowing its latitude would answer the question. The orbit parameters are listed on Wikipedia https://en.wikipedia.../Phobos_(moon).