In fact hypersonic missiles are pretty common. Every rocket that leaves Earth’s orbit is ‘hypersonic’. There is nothing inherently special about being ‘hypersonic’ in general. In space everything achieves hypersonic speed quite easily(ICBM’s and space rockets) are all hypersonic when they enter space. The trick of hypersonic missiles is to do that within the constraints of earth’s atmosphere. The US has them:

https://www.raytheonmissilesanddefense.com/what-we-do/hypers...

https://www.lockheedmartin.com/en-us/capabilities/hypersonic...

and apparently the Chinese:

https://theconversation.com/chinas-hypersonic-missiles-threa...