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This is how much of downtown Tulsa, OK is covered in parking lots:
https://i.redd.it/ukzcn1xx6cc91.jpg
There is no technological problem to covering a parking lot in PV, it's a question of the political will and money to do it.
Add to that urban freeways with enormous junctions ringing this supposedly dense core, cutting off surrounding areas from car-free access.
Yes, the city center has some tall buildings. The car is still dominant on its streets though.
If land was truly scarce, parking lot solar would be a good option but I expect most installations will use the cheaper option of just building solar farms a long ways away from people.
Solar parking lots also might make sense in situations where all the power is being used on-site, and it's cheaper in the long run than buying power from the local utility.
You can also see what looks like a regulation size baseball diamond to the top right side.