Oracle Custom Application content is not loading within Iframe in Iphone after Upgrade to IOS15

Hi Developers,

I created a custom oracle application which is working fine in Windows browser and android browsers, but not working within iframe in IOS15. Previously, it was working fine but after upgradation in IOS15 My application is not working any more within Iframe although it is working without iframe in same IOS testing Device which is useless for me.

i am trying to fix this issue from last 6 months but unable to resolve.

Any pointers to solve this issue will be greatly appreciated.

Thanks in Advance