I got it to work! After you've installed it, when you go to Settings - System - Software Update, make sure that the option for getting beta updates is turned off. Then once it's turned off, you can click Software Update and it should download from there.
therunway12
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
Same situation here. I've tried everything and it still says that 13.4.8 is installed. It even has the tvOS 14 profile saved, but it's not accessing it.