The 04/23 GE image shows beginning construction for three revetments here.The inside clearance of each bay is about 110', large enough for aircraft with a 65-85' wing span.
The North Ramp has been used by the Red Hats in the past for the evaluation of "acquired" Russian aircraft. In the current geopolitical climate it is likely that the construction is in preparation for the evaluation of newly "acquired" Russian or Chinese aircraft.
There is a new trench for power lines from the nearest power pole to the southernmost foundations.