I think my city (Tulsa) still assigns cars to individual officers who can take their cars home.

The cars last longer this way and generally get better care.

I guess they could be paid some sort of charging allowance to charge cars at home.

A suburb (Broken Arrow) just placed a police Tesla Model 3 in service but that is about all I know about it.

There has been pressure for the Postal Service to do electric delivery vans as part of their upgrade of delivery vehicles. I think they are going to do a few more than first planned but the charging infrastructure to charge that many vehicles overnight made it unaffordable for now.