This is just Indian propaganda.There are three main problems with hypersonic missiles.Heat-resistant materials, space reconnaissance system, scramjet.
China’s lead in hypersonic speed is mainly because it leads the United States in heat-resistant materials.Scramjet is a more difficult technology. The Indians skipped all front-end technology and directly used the more difficult scramjet.
Typical indian.
We have done this many time. ISRO skipped semi cryogenic engine and developed cryogenic engine directly.