I clicked on the publish online button. I returns a link. When I look at the published doc it seems to be a pdf. I use cmd f for search but search can't find anything. The hyperlinks don't work either. Kind of useless.
It's not a PDF. It's been turned into HTML and CSS and is very similar to a fixed layout EPUB file.
While you can't search it, there's an option on the first screen to allow viewers to download a Print (PDF) document. If turned on, there will be a download option for the PDF. The PDF can be searched or printed.