The thing is that the Greek government's position hasn't changed in years either.
So all they would have done is repeat previous PMs formula - restate position, then move on to migration and security issues etc. Braverman was in Greece learning about their migration plans 3 weeks ago! They are an ally supposedly.
Nobody was expecting Sunak to change their mind or resolve the issues yesterday!
Sunak is either a petty twat unable to see beyond the end of his nose OR they were looking to cook up a story which costs them nothing but which makes Sunak look like he's standing up for (foreign) statutes or something!