No, none of the major rental companies allow towing:
CruiseAmerica.com specifies very clearly that their insurance does not cover either the car being towed or any liability arising due to towing.
Outdoorsy Standard Insurance policy excludes any personal vehicles that a renter tows:
https://www.outdoorsy.com/help/whats-covered-by-your-insurance-what-isnt
RVShare website provides lot of information about towing, however it also has the following footprint that considers towing as a material breach of contract!
