Can't enroll in 15.1 beta in VM after signing into iCloud

I have created an Apple silicon macOS Sequoia VM using UTM on my Mac also running macOS Sequoia. As noted in the documentation, I can now sign-in to iCloud in the VM.

I want to update the VM to macOS Sequoia 15.1 beta. (I understand that Apple Intelligence won't be available in the VM. I need to test my software.)

However, when I go to Software Update in the System Settings, I am not offered the opportunity to enroll in the beta. (The "Beta Updates" section never appears.)

Is this intentional?

Can't enroll in 15.1 beta in VM after signing into iCloud
 
 
Q