Scoping header/footer to blockquote is not mentioned in the spec

[xi]

I checked, but there is nothing about blockquote in the spec:

footer (scoped to the main element, a sectioning content element, or a sectioning root element other than body) - No corresponding role
https://www.w3.org/TR/html-aam-1.0/#html-element-role-mappings

"sectioning content" is defined as one of these: article, aside, nav, section. So headers/footers inside of blockquotes should not be ignored.

[matatk]

I think this one is actually valid as it is: the spec also mentions sectioning root elements, which includes <blockquote>.

[xi]

I see. Thanks for the clarification!