I am Website admin, I have my website and it is not opening in iOS and working in android devices

I had my website perfectly opening before the iOS 15 update for iPhones.

But after that whenever anyone is opening my website it shows blank screen.

It is working fine MacBook safari, chrome and all other android devices.

Here is the link to the website : [https://startstaging.web.app/PO/1709528483037)

I have cleared history, cache, have done resetting the phone, still it hasn't done anything.

I don't know how to make it work, do help.