Can you buy an EV adapter that sits between the MFT and the socket?
if so are they manufacturer specific or could you use , say, a Metrel on a Fluke?
Yes - this is the Metrel one BUT it only works with the newer models
https://www.test-meter.co.uk/metrel-a1532-electric-vehicle-charging-station-adaptor?utm_source=google_shopping&gclid=CjwKCAjwi9-HBhACEiwAPzUhHKgGsFJnl6HW1jqYuRBpgRbOZDky1RKRSqwuUI9tijr8US5J9zbT3RoChZwQAvD_BwE