That looks to be some individual dev's dragdrop example made 4 years ago. Just because it's hosted on azure doesn't mean its a microsoft demo.
DOMContentLoaded: 4.61s
Finish: 19.48s
So it took 5 seconds to show me a splash screen, and another 15 seconds to actually start? It's 28 megabytes...https://pagespeed.web.dev/analysis?url=https%3A%2F%2Fwww.mud...