Looks like GM parts sellers on the web offer Bolt windshields and wiper switches with rain sensing:
https://www.chevynationparts.net/v-2017-chevrolet-bolt-ev--premier--electric/body--glass-windshield
https://www.chevynationparts.net/v-2017-chevrolet-bolt-ev--premier--electric/steering--shroud-switches-and-levers
Seems odd that these parts would be listed when rain sensing windshield wipers are not optional or standard equipment.
https://www.chevynationparts.net/v-2017-chevrolet-bolt-ev--premier--electric/body--glass-windshield
https://www.chevynationparts.net/v-2017-chevrolet-bolt-ev--premier--electric/steering--shroud-switches-and-levers
Seems odd that these parts would be listed when rain sensing windshield wipers are not optional or standard equipment.