The Help drawer now has a search field beside its title. Type two characters and the results replace the article; open one and it loads in the drawer like any other help link. Clearing the field brings the article back, and the drawer always reopens on the help for the page you are on.
The drawer's "Help" title is also a link to the help centre, and breadcrumbs at the top of a help article now look like the links they always were - the route back to a section, or to the front page of help, was drawn in grey with no underline and read as plain text.
There is also a new article, "Build a Link-In-Bio List", covering blocks, the profile and address, publishing, social profiles, and the click counts. It is now what the Links pages offer as their help; pasting JSON and designing the page are linked from it.