Hard to say. Given this guy has apparently lied before and started up a whole drama about not getting ammo just to fool the west/Ukrainians into continuing to attack his positions and get destroyed I wouldn't rule out this is an elaborate ruse to bait the Ukrainians into charging Russian positions thinking this is their best time. Basically an attempt to further weaken their forces and shorten the conflict by drawing out reserves.
That said, could be real too I guess but it seems more likely it's trying to bait the Ukrainians as he's done before.
Russia moved into the area where the control center for the site is (the still crewed one) in the first month but there was fighting with the Ukrainians. They entered into an agreement to jointly run it with the Ukrainian troops and personnel present. Russia just mainly wants to avoid NATO/Ukraine Nazis staging a false flag there (blowing it up, spreading radiation, whatever) and blaming them.