to all points, yes, ev owners will eventually run out of most of the 'free' or subsidized fuel; albeit I would suggest that mostly only tesla owners ever felt this in the first place.
- note: I have rarely gotten free electricity anywhere in my locale, not even a convenient 110v wall socket, any place that actually has EV service was either a chevy dealer, once at a hotel/restaurant had an EV charger, and the rest were all EV Pay services.
1) there is no separate 'fuel' tax for electricity, but I can guarantee that taxes were paid by someone at some point to generate/sell/buy that electricity.
2) there will of course be loss of tax from declining fossil fuels, but I suspect a significant chunk if not most of it will be made up from taxes on other electricity sources.
3) in the mid term, I expect to see gas taxes rise higher to make up for the perceived loss from EV, however what will happen to gas has/is already happening to cigarettes (raising taxes, lowering volume until extinction).