Thanks for your question and your interest in using the Neuroglancer atlases as a teaching tool!
Your astute observation about DHBAv2 is related to a few quirks of how the atlases were constructed. The short answer is that HMBA and DHBAv2 are currently released only as subcortical atlases.
The 3D cortical glass brain uses segmentations from the Allen Human Brain Atlas ( Allen Human Reference Atlas - 3D, 2020 (new!) ) as a visual reference, primarily because they were drawn on the same MRI reference volume. The AHBA uses two cortical taxonomies, gyral and Brodmann, which are bound to each layer. In HMBA’s HOMBA ontology, V1 is not subordinate to Occipital pole. Instead, they are parallel nomenclature systems, see interactive reference here: HOMBA ontology — Common Coordinate Framework and Multi-Species Atlas Primer (CCF-MAP).
To get to your idea of highlighting a particular region and scrolling to it, there are ways to set up a Neuroglancer instance where a subset of regions is already highlighted and students could scroll to it. Instead of searching for a region, they could pick from a predetermined set of links with different structures toggled on/off. You could still take advantage of the hierarchy within the Brodmann branch, eg. occipital cortex would be the parent structure of V1, area prostriata, and extrastriate occipital cortex.
Happy to discuss more about how you’re thinking of using the atlases, especially if you have feedback on how easy it is to use and ways to improve the experience.