Normally only the 2nd-level headers of a page are show in the right table of contents, and deeper levels are only shown when they are part of an active section (when it is scrolled on screen).
You can show deeper levels by default by using the following configuration, indicating how many levels should be displayed:
html_theme_options = {
"show_toc_level": 2
}All headings up to and including the level specified will now be shown regardless of what is displayed on the page.
To remove the Table of Contents, add :html_theme.sidebar_secondary.remove: to the file-wide metadata at the top of a page.
This will remove the Table of Contents from that page only.