We are still working with a trial version of RH2022, working our way through the steep learning curve. Part of the process we're struggling with is with how we have been using the !SSL! files.
Currently we deploy RH user guides to various versions of our process (Development, Staging, QA, Production) by copying and pasting items from the !SSL! output folder (Printed Documentation and Web Help folders that are in the !SSL! folder) that are created in RoboHelp 2017 that have all necessary RoboHelp files including the index.htm (our compiled project) and Printed documentation (Word and PDF). So far, we do not see a folder similar to this !SSL! output folder in RoboHelp 2022.
Too many people got the path a bit wrong and generated to their project, overwriting the source files in the process.
Now you have to generate to a folder outside the project. Personally I create a folder called Outputs with sub-folders for each output.
There's lots of information about the new UI versions in the RoboHelp Tour (grainge.org).
My site www.grainge.org includes many free Authoring and RoboHelp resources that may be of help.