For those of you who have enrolled but haven't received the beta for download, there is still hope. I sent a DM the Samsung Rydah about it. He then asked for my baseband version and build number. I am on the latest update for the unlocked Note 20 Ultra devices (N986U1UES1ATJ3), which was released on 10/22/2020.
From what he said, there is no path to take users from this build to beta as of yet. Samsung needs to release another patch that will allow the beta to download and install.
Hope this helps those who wondered why they saw nothing after enrolling!!