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.

Right but what were these required specs for the existing implementation?

I couldn't parse your question