Existing ICBM reentry vehicles (warheads) are already waaaaay into the hypersonic realm. They travel at about Mach 24, while the definition of hypersonic is Mach 5 or above.
Yep, after a certain point its impossible to stop an ICBM warhead.
A laser “might,” maybe get one while its in ascent or high above the atmosphere, but there simply is no tracking tech possible to do so 100% of the time, and definitely not when its approaching target.
They are hypersonic. Some film of an inert MMIII warhead in the late 70s came spinning in and hit at the edge of the beach on the atoll. It was a little off its expected target and hit an empty small steel building at the edge of the beach where they had cameras. When the warhead hit the building there was a blinding thermal flash and the building and nearby palm tree evaporated.