Yea, anything Russia gave the Wagner Group is going to be 25 years or older and they still have to deploy it under constant surveillance.
Russia really doesn't need another public demonstration of their crapy tech.
The Russian S-400 Air defense system is rated among the best in the world. It is a big deal if Hezbollah gets a substantial deployment of them.
But I cannot see Russia trusting the Wagner group with such weapons. There would need to be Russian "advisors" maintaining and controlling those units. That is an even bigger deal if it happens.
All just noise so far. Israel is still wiping out Hezbollah positions in Lebanon with their fighter strike forces and armored force raids. Lots of Hezbollah rocket positions are now scattered in bits and pieces all over the area.