Form toolkit -- can't get tooltip to work with component as described in doc topic or in tests

Continuing the discussion from Discourse toolkit to render forms:

I can’t get this to work. It just refuses to render a tooltip. I copied the exact

            @tooltip={{component DTooltip content="component"}}

that’s in the form-kit test. If I use a component then no tooltip renders.

I can’t find an example of a component being used in core or in all-the-plugins, so, it looks like it’s impossible to use i18n with a tooltip in a form? (I was hoping that maybe I could just not figure this out)

I tried both of these imports, the latter from the test (why are there two? Maybe it’s two ways to call the same file? I see only on in core):

// import DTooltip from "discourse/components/d-tooltip";
import DTooltip from "float-kit/components/d-tooltip";