As far as I understood there should be no fuel consumption in the Easy A2A version of the campaign to facilitate not needing to actually plug into the tanker. However, at least in missions 6 and 7 for me fuel is consumed as if I was playing the normal version of the campaign. This in addition to the fact that in at least Mission 7 the initial amount of fuel is way less in the easy A2A mission compared to the normal one (~5000lbs vs. ~10000lbs) seems to make the mission practically impossible to complete without running out of fuel.
First mission I encountered this was mission 6 and had the same issue with mission 7. In missions before mission 6 I did not see any fuel consumption as expected for the easy refuel versions as far as I know.
Running the latest version 2.9.4.53707