Did they use Pantsyr tho ? It doesn't really have ABM capability. That Pantsyr should be intercepting something else, and falling booster is unfortunately a side effect. At least it should be Buk. There is tho S-300/400 site in Belgorod supposedly. As for the S-300/400's. the 48N6 missile have kind of warhead which optimized to destroy missile warhead in flight. So well, for it's not gonna destroy it completely. and in populated area the remnants of missile may still reach something.
The question tho is how many missiles launched by Ukraine and what else accompanying it. There were also reports of Drones being intercepted in Kursk. Sama might also happen in Belgorod.