When you open RoboHelp, in the bottom left of the dialog you will see Open Sample Project. That is where you open and generate the About RoboHelp sample project. I'll come back to that in a moment.
From your reply it is clear the problem is the server. You say the help works locally so the output from RoboHelp is good. There is a known problem where occasionally the output will be generated to the server and the search does not work at all. The solution to that is usually that the whx folder on the server is deleted and the the output is published again. Your problem is different but it could be worth trying the same solution.
Re my question about did the search work at some point, forget the Classic version, what I am asking is did the search in the new outputs work at any time. Did they initially work and then fail or has this been a problem since changing to 2022?
Are you publishing to the same folder on the server that you used for the Classic versions? If you are, did you delete all the old versions first? RoboHelp does not delete from the server folder so you would have a mix of old and new.
Now going back to the sample project, I think it is worth you generating the same type of output (Responsive?) and getting IT to let you publish that to another folder on the server. If that has the same issue, then it could be an issue with the server configuration or what is getting to the server. Compare what is in the locally generated folder with what is on the server. It has been known for IT to decide not all the files and folders are needed!
Having written the above, there is one setting that might be worth checking first. In the preset go to the Search settings. Is Enable SubString Search checked? If it is, disable it and try again. That is known to slow down search results.
Please come back when you have tried all the above and let us know where you have got to.
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My site www.grainge.org includes many free Authoring and RoboHelp resources that may be of help.
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