Usually no airbag sensors in the rear of the vehicle...(rear-end collisions push you back into the seat w/a rebound handled by the seatbelt):
https://autoily.com/do-airbags-deploy-in-a-rear-end-collision/
https://autoily.com/when-do-airbags-deploy/
I definitely went forward!! My sunglasses flew off.
The seatbelts restrained me.