Report sections in PowerPoint (Office 365, and I think from 2016 onwards)

Is your feature request related to a problem? Please describe.

In the slide outline of PowerPoint (press control+tab from the regular slide view), you can open the context menu and choose "Add section". After prompting for a name, this (visually) puts a heading above the current slide, with an arrow. You can use the left and right arrows when on a section heading, to collapse or expand the section, similar to a tree view in Windows explorer. NVDA completely ignores these section headings.

In the view ribbon, you can select "Slide sorter". This is primarily designed to let you drag slides around to reorder them with the mouse, however, according to Microsoft's instructions on Slide Sorter: https://support.microsoft.com/en-us/office/organize-your-powerpoint-slides-into-sections-de4bf162-e9cc-4f58-b64a-7ab09443b9f8 you can also use it to manipulate sections.

NVDA moves through the slides in the slide sorter, but again ignores everything to do with sections.

Narrator on Windows 10 does report each section as you move to it, and the section headings.

Describe the solution you'd like

Ideally to report section headings when navigating so that this feature can be used.

Describe alternatives you've considered

Additional context

I'm using NVDA 2020.2 beta 2 on Windows 10 version 1903 Windows 10 (64-bit) build 18362 with Office 365 (64-bit) Version 16.0.12827.20336 - but I gather this has been around since Office 2016.

nvaccess / nvda