Is there a guide somewhere for the direct upgrade to 22.04?
Or it be posted somewhere?
I know that it has been a day from the release. 
The steps are the same as normal ubuntu:
Type in update-manager -d in a terminal, then the software updater will open and notify you about an upgrade to 22.04. Click upgrade and follow the instructions.
Release notes including upgrade instructions are on our website
and
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FWIW, I upgraded my two-year old Lenovo laptop and all it is running fine. This laptop includes a LAMP server and other dev materials.
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