The article comparing-patterns-template-parts-and-reusable-blocks says:

After creating a synced pattern, you can ‘Detach’ it to a regular block, and edit the block without affecting your already saved synced pattern. For more information, you can learn more in the Synced Pattern article.

which links to this page where it says the same thing in the first paragraph, only without a link to an article with the answer.

It would be helpful if this was a link to the Synced Pattern article.

This feedback could be applied more broadly as one of my biggest frustrations with using .org documentation is referencing other pieces of documentation without actually linking to those pieces of documentation and leaving it up to the user to find what y’all are talking about. The developer docs are particularly bad about this.