That's some wild theory. In my experience as an BEV owner (Skoda Enyaq iv80) it is highly selective and having same plug means nothing if there are incompatible software stacks inside.
Some chargers are working fine. Ionity, BP (ironic)
Some will not initiate charging because registration email/login/payment in their app does not work. (Freshmile in France, some Swedish one in Greece whose name I forget did not sent an activation email)
Some chargers just straight out doesn't like your car, because reasons. "Find another charger" you will be told. (Fortiza)
Some chargers are just broken, but you can't tell until you arrive. (Another Freshmile in France)
Some chargers are working fine. Ionity, BP (ironic)
Some will not initiate charging because registration email/login/payment in their app does not work. (Freshmile in France, some Swedish one in Greece whose name I forget did not sent an activation email)
Some chargers just straight out doesn't like your car, because reasons. "Find another charger" you will be told. (Fortiza)
Some chargers are just broken, but you can't tell until you arrive. (Another Freshmile in France)