h7-h9 via aria-level
elements h7 - h9
elements h1
element, with role="heading"
& aria-level="7"
h2
element, with aria-level="8"
h1 - h6 + aria-level 7 - 12
elements with no content h7 - h12 (aria-level 7 - 12)
elements with aria-label
role=heading + (aria-level 7 - 12) on div
elements