Here you can see that do-release-upgrade from 19.10 to 20.04 doesn’t see 20.04’s availability without the -d flag.
ian@Ian-Blue:~$ do-release-upgrade -d Checking for a new Ubuntu release Get:1 Upgrade tool signature [1,554 B] Get:2 Upgrade tool [1,344 kB] Fetched 1,346 kB in 0s (0 B/s) authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg' extracting 'focal.tar.gz' [screen is terminating] ian@Ian-Blue:~$ do-release-upgrade Checking for a new Ubuntu release No new release found. ian@Ian-Blue:~$ less /etc/update-manager/release-upgrades | grep Prompt Prompt=normal
We’re running 3-4 days post-release, and a lot of folks in the help forums are asking and we lack a clear answer.
Is this Phased Upgrades?
Or an oversight?