I'm facing this issue after refreshing the TestFlight page, anyone getting like for me

Yes, we are need to update... Please check your mail and fix that issue Because Apple has been deprecated somethings, so we need to update and fix Like this so https://developer.apple.com/documentation/uikit/uiwebview

Yes, I have faced this issue So, make sure your sizes for 1x and 2x Check sizes for App Icon and Topshelf images also the middle and back images

Update the Terms and Conditions by account holder (Client) Login to your Apple account then Mobile browser or web Browser then Accept the Terms and Conditions Refer below link [https://blog.krzyzanowskim.com/2019/01/12/the-lost-art-of-great-apple-ux/]

Yes, same issue for me Check your Launchscreen images sizes and check your Attribute inspector Portrait options, it should be enabled in iOS 15 improved some additional launch images

Same here, check below answer https://stackoverflow.com/a/72612009/9409368