I have the similar issue but it seems that my ipa was uploaded but it was just not shown in my versions.
aitutor
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@App Store Connect Engineer I also tried to upload the testflight by Xcode. From Xcode everything seems normal, but I cannot see my new testflight from app store connection.
I have submitted the issue to feedback assistant, and the feedback number is FB15570536.
My issue has been solved. A new installed package make the microphone on as default and I have to add NSMicrophoneUsageDescription in my info.plist. Some mails from app store has pointed out the problem but I missed them.