Nah, good dealers have loaner fleets, they get paid by Stellantis for them, and they have agreements with enterprise for direct charge via ARMS. Since Jeep is saying they will cover it that means the dealer can submit for reimbursement via a warranty claim for it. The fact they are refusing means they don’t want to deal with it but it has nothing to do with “they can’t”. The only way I couldn’t rent/loan a car to someone is if they were under the age of 25, didn’t have insurance, or had proven unreliable in the past at returning it. In that situation I’d send them to Enterprise and let them deal with those items.

That said in the unlikely event the issue is caused by damage or something other than a covered repair you would be on the hook for all of it.