Cannot submit App with App Clip for test flight

I am attempting to test Advanced App Clip Experiences via test flight, however when using Xcode 12.3 beta to attempt to submit an archive to App Store Connect I get the following error message.

The following issues occurred while distributing your application.
App Store Connect Operation Error
ERROR ITMS-90834: "Unsupported content. This app contains an app clip. Apps with app clips cannot be submitted at this time."

Are we not able to submit Apps with App Clips for test flight? How are we intended to test advanced experiences?

I also received this error

App Store Connect Operation Error
ERROR ITMS-90534: "Invalid Toolchain. Your app was built with an unsupported SDK or version of Xcode. If you plan to submit this build to the App Store, make sure you are using the versions listed in https://help.apple.com/xcode/mac/current/#/devf16aefe3b or later."

I am assuming this means that I cannot submit apps built with the Xcode beta.