All it takes is a couple of hits, and the shrapnel will take out the rest in that orbit.
The Chinese are known to have tested a weapon like this a few years ago. The resulting shrapnel was bad. It’s generally seen as a bad strategy for this sort of thing, unless the goal is to have a serious, long-term effect on space-based communications. You could shut-down satellite communications for a century without a great deal of trouble — whether intentional or not. No one wants that.
I highly doubt the Russians would go this route. It’s foolish and irresponsible.