Yes, I imagine that the thinking must be something like that. However, one might mnot have to stretch that thinking far to also take, say, a CU, if the new house needed a new one
A buyer would presumably expect all elements of 'the electrical installation' to be left - so, if the EV charge point is going to be removed, I would think that it would need to be done before contracts were exchanged, quite probably earlier (when conveyancing forms were completed by seller) - since if part of the electrical installation was going to be removed before completion of the purchase, one imagines that the buyer would have to be told before they became committed to the purchase?