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Search does show up games made by your search term. Either there are no indexed games by that creator or it is a very, very generic name that is part of many game titles. I imagine you would have trouble finding games of a creator named "fps".
https://itch.io/search?q=BobbyWojak
Also, search engines do not care how popular a publisher is. If it is a non generic name and you search that name, they find it.
https://duckduckgo.com/?q=itch+BobbyWojak&ia=web
And, uhm, if you do know the name, just replace the part in front of replaceme.itch.io with that name.
Search previously did search for profiles. This was changed a few months ago. Now search searches for profile names and display names. But the results will only be projects published by those profiles, if any. It will find indexed projects, unless the profile name is very generic, because search results are capped at about 60 results.
What exactly?
You did notice that link, did you?
https://itch.io/search?q=BobbyWojak
That search for your name results in only one project and that is yours.