WPT coverage of the tests of svg-aam at the revision 5602b0f210e3. The tests link to their results in the browsers on wpt.fyi. The tentative tests (experimental features) and the reftests are listed separately from the stable tests.
the <image> elements are not in an <svg> element: the HTML parser creates <img> elements ("Change the token's tag name to img"), which are void, so the <title> elements are their siblings. As HTML-AAM says (and html-aam/img-src-srcset-roles.tentative.html tests), an <img> without src, srcset nor accessible name represents nothing and is generic, not an image