Yes, you may park a MyWheels car at an Amber hub if you reserved it through the Amber app. In February 2023, Amber cars will be restyled to the MyWheels design. So you will soon be driving a car with the MyWheels colors and logo. You can park these cars at the Amber hubs as usual.
Wondering how parking works within the service area? Check out this article: How does parking work in a service area?