I figured it out:
Maybe there are some third - party packages using UIWebView in your application .
The solution only involves three steps:
Use the right versions of Xamarin.Forms and Xamarin.iOS.
Add a flag to the build configuration.
Build and submit your app to the App Store and celebrate!
BennyB0o
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SOLUTION:
So if you aren't seeing the build in the App Store Connect and you have uploaded it with no problems. It might not be visible but there might actually be a problem that the Transporter was not showing you. If you check your email that you have connected with your Developer account, you will see a email from apple saying if the build was uploaded or what the problem actually is.
Steps to fix: Change the version of your app so you can upload it again
Upload using the Transporter (or preferred upload application)
Check email from App Store Connect
Fix problem that the email has addressed
Your all set, just re-upload by changing the version again and you should be good :D
Good luck
~Ben