Verify the app is added to your themeOpen the theme editor and confirm that the RuffRuff Table of Contents block or app embed has been added to the correct template.
The app detects <h2> and <h3> tags (default setting) in the content body. If the content contains no headings, or if the headings were not created using the "Heading" format in Shopify's rich text editor, the TOC will not appear.
Verify that the heading levels selected in the app's Settings page match the ones used in your content. For example, if your post only uses H2 but H3 is the only level selected, the TOC will not appear.
On the app home screen, verify that the app is set to "Enabled."
Displaying the TOC on products, pages, and collections requires the Regular Plan. Please check your current plan.
Verify that no hidden metafield has been set on the content. If the metafield with namespace table_of_contents and key hidden is set to 1, the TOC will be hidden for that content. Open the content in your Shopify admin and either set the hidden value to 0 or delete the metafield.