Tanstack Router docs are missing documentation present in Tanstack Start docs

Recently we switched from React Router v6 to TanStack Router for our React application. We were seeing some unexpected behavior around error boundaries, but looking through the Router documentation I couldn't find anything on it!

Then i found it here in the Start docs, and here deep in Data Loading in the Router documentation.

As a developer I sort of expect to see a top-level section in the docs around Error Handling, like in the Start documentation, or under the Routing section. Just wanted to give some feedback on it. Sorry if this is the wrong place for that.

まず、TanStack Start のエラーハンドリングのページと、エラーの扱いに関する Router ドキュメントの Data Loading セクションを比較します。Router ドキュメントでエラーハンドリングが期待されるナビゲーションまたは Routing セクションを特定し、そこで Error Boundaries のガイダンスを見つけやすくして、ドキュメントサイトで結果として得られるリンクと文言を確認します。