I think you should certainly inform Motability not necessarily for them to do anything now but if other problems come to light they will be able to easily see that things have been difficult from Delivery.
Hopefully it is ‘just’ a rushed PDI but it shouldn’t happen. I’m also speaking from my own experience our previous car was a ‘rogue’ vehicle it had numbers of problems and as time passed the vehicle showed more problems we were told by Motability that we could change early. The pandemic put paid to that but we have now changed.
I have to say I found Motability very fair in their handling of the situation.