Not work Table of Contents Rank Math with classic editor

Hello @rstrah,

Thank you for contacting Rank Math support.

Our plugin’s table of contents is added as a block and can only be used in the block editor. It will not work in the classic editor or any other page builder. You can use some other TOC plugin if you want to add it to the classic editor. https://rankmath.com/compatibility/?s=table+of+contents&post_type=rm_compatible

Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.