It probably depends how the chargers are laid out. In four and a half years with the Model 3 I can recall a number of variations of layout, some which would work with the EV3 and some which probably wouldn’t. I’ve just looked back at some old photos, and of five different sites quickly found three would be no issue and two might be problematic if not impossible.
The issue is probably that there’s no consistency in layout and you are not going to find out till you get there. Note, these sites are all in UK, not sure if layout consistency is different abroad.
Maybe an idea for a thread is for anyone stopping at a Tesla Supercharger site to report back here if layout works with EV3 or not.
Illustrative photos below, in order Rugby Services, Trafford Centre, Havant, Membury Services westbound, Norton Park Hotel. Aside from Rugby which I know is not, unsure whether any of the others are open to other vehicles or not.