TLDW: They're adding a rear view camera in 2024 below the rain lights so we'll get to see some action from cars looking to overtake.
It was on Stroll's car during Silverstone FP1 but wasn't broadcast. It was also on the Safety Car and used for a few seconds, though that was added to the rear wing of the Safety Car so the angle was higher.
Sounds like a fantastic addition, always good to get more camera angles especially upclose overtaking. Though I do hope they improve the networking at some of the street circuits so the feeds are clearer