Update:
The expected repair time has come down to "closer to 2 weeks" from 4 which is good news (once the panels arrive). Also talked to my insurer about a rental car and was offered a Hybrid Camry through Budget Car Rental, or to book myself and claim back at "reasonable cost" whatever that means. Camry would be fine but i would prefer an EV. I then looked at right2drive & compass as they do EVs but found some bad & worrying business practices. They try to recover the horrendous hire costs (500$/day+ seems common) from the opponent or their insurance in your name and you have to agree to help them in any way. From calling the other party all the way to going to court if necessary. If they or you fail to do so for whatever reason you remain liable for the hire cost. It seems all hunky dory on the surface and can be very convenient for the not at fault driver, if they successfully bully the money out of the other party, but there is risk and a very questionable business model that, in the end of the day, increases the insurance cost for everyone.
I ended up ringing the at fault insurance which were not able to offer a EV either, just a hybrid Camry due to contractual obligations with Hertz, but were happy for me to book and reimburse the invoice. I now booked a Polestar 2 which was similar money to a hybrid Camry anyway so I think this is by far the best solution for everyone involved.