American auto unions largely aren't competing in the EV space. 80%+ of EVs sold in America aren't built using American union labor - Tesla at 60% sales is non-union, Rivian at 10%, Toyota imports EVs, Ford and Chevrolet build the Mach E and Equinox EV in Mexico
It doesn't refute GPs point. If foreign EVs are better than ICE vehicles manufactured by union labor, the unions are going to have a problem letting the foreign EVs in.