@Zoe.
No, your factory fit reversing camera is part of your Motability order, and therefore your contract with them and RSA.
The order, with any factory fit extras, goes through to Motability at the time of ordering, and is approved.
On the other hand, if you took delivery of a standard car and went to say Halfords to have a rear camera retro fitted, then that wouldn’t be covered by RSA insurance in the case of a claim