Can I run 2 wires from a 2 pole breaker to a single slot on my EV charger?
As a 240V load in the US, that takes two hots (from opposite legs of your service) - NOT hot and neutral. The two-pole breaker is exactly what you need. If you’re using cable with white/black/ground wires, you’ll need to re-mark the white to a hot color (such as red or black), and connect one to each pole of the breaker.
A 60A breaker on just 120V would not be done. A ~6KW load would have four times the voltage drop (and require larger more expensive wire) compared to the same power at 240V, so loads that big are always at the higher voltage.