@nprofile1q... I'm not optimistic.... radio buttons have to work that way because they're a select-only-one type, and just because checkboxes should be able to do the same thing, doesn't mean the devs set it up that way. However.

If such a thing was possible, i would expect the command to read like "step up out of this leaf in the hierarchy please so I can tab to the next block on this level", and with that in mind, I dug around keyboard navigation stuff until I found this:

"Tab: Move forward through interactive elements (links, buttons, form fields)

Shift+Tab: Move backward through interactive elements

Enter: Activate links and buttons

Space: Activate buttons, toggle checkboxes, scroll page

Arrow keys: Navigate within components (dropdown menus, radio groups, sliders)

Escape: Close modals, cancel actions, exit modes

Home/End: Jump to start/end of content or lists"

(source: https://www.webability.io/glossary/keyboard-navigation)

So I would try Home/End on your particular form and see what it does.

Otherwise you might be out of luck. Possibly you could use the keyboard to search and place your cursor at the next instance of whatever indicates the start or end of a question, if that's unique and consistent?