During Taking Point: Starlight Drive In, one may be unable to clear all of the hostiles even though they have been removed.
Possible causes range from clearing the drive-in prior to be assigned the mission to clipping issues with the hostiles (molerats) not coming above ground.
>>> On Xbox One, the player character can simply remove their weapons and use their bare fists to punch the hole with the marker over it.
If bare fists do not work, try throwing a drag grenade at a car which might bring the mole rats above ground. <<<
That's a XBOX One workround, but i don't know if that works on PS4 as well.
So just try and see...