Nope. Iskander is Mach 7 at its absolute best, which is about 1000 mph less than what is generally considered "hypersonic".

The reason why our army is unable to shoot down every missile launched at Ukraine is that a) we are using semiantiqur S300 anti-air missile and b) we don't have enough. And even then AFU shoots down like 60-70% of Iskander launches. With IRIS-T finally arriving, we might be able to do better.

The bigger issue is Russian bombings using MLRS Uragan and the ground variant of S300. They are still supersonic but due to very short range (100-ish miles) they are much harder if not impossible to intercept. Also the Shahed drones have been an unpleasant surprise, but at least there's some progress on that direction already.

Of you are talking about Kinzhal, it is a hypersonic missile only in the loosest definition of the term. It only becomes hypersonic if launched off an already supersonic plane, and only for a very limited amount of time.