Hello, Sir.
Thank you for contacting us.
We have investigated the issue you reported and found that the page where you want to add a table of contents is not a specific single blog page or post page. It seems that the page is a dynamic page where you are displaying some specific posts. Unfortunately, it is not possible to show a table of contents on such a page.
If we have misunderstood your request, please let us know.
We appreciate your patience and cooperation.
Sincerely,
Bishal
