Is there a list of turnpikes that don't charge if you are driving an EV?
I never heard of any, but that doesn’t mean they don’t exist. Free use of toll express lanes is a more common scenario.
I-95 In Florida allows Free Express Lanes if you're driving a Hybrid/EV (for an example)
Keep in mind that you have to apply for each of these highways, place stickers on your car and follow procedures (such as placing a transponder in an RF blocking bag) in order to do so. So if you're wanting to use express lanes freely throughout multiple states, you're going to be driving a bumper sticker collection down the road.