After multiple specs had already been pushed through, they finally decided to write down a list of what is still needed.

22 items: https://w3c.github.io/webcomponents-cg/2022.html

In those things like ARIA are not a single spec. It's now close to five different proposals and a huge ARIA Object Model proposal.

Similar thing with Form Associated Controls: it's not one spec. It's a bunch of specs fixing idiotic issues like this: https://github.com/WICG/webcomponents/issues/814

Note: easily half of these only exist because of web components and for web components. Literally nothing else has these issues.