I cross-post this issue from WildWebDeveloper project, because on a vanilla Eclipse installation it doesn't show up.
eclipse-wildwebdeveloper/wildwebdeveloper#552
I tried to install latest snapshot as suggested, with no luck. (On plain Eclipse there's no need to update the plugin, it works even with release).

Every angular directive inside any template gets marked as undefined, but at the same time, its doc gets correctly shown on hover.

To quickly reproduce the issue, just import this basic project and try to validate app.component.html
https://github.com/4javier/angular-ivy-base