Here in France Tesla have opened up some of their superchargers to non-Tesla cars now.
Charging has to be initiated by the Tesla app and the press release stated the users must live in France (and other countries such as NL where this is also being trialled), but there is nothing stopping you from downloading the app, then registering and choosing France as the country you are in. You can set the app to be in English regardless.
Then just set your payment card and search for a supercharger. They are now also listed on ABRP.
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