The minutes of that meeting merely say that Theresa May informed them of the outcome, which they all knew already of course. It says nothing else. Quite possibly nobody else spoke.

The meeting I'm referring to is this one

https://amp.dw.com/en/uk-will-oppose-any-idea-of-eu-army-des...

In the years since the vote I haven't seen the EU agree on any changes triggered by the vote or even really discuss why it happened. From the agendas of their meetings you could think it'd never happened at all.