That, I believe, is the section of the guide that has all the coloured bars and there tags, i.e. "Core", "Tool", "Optional", etc. It is in the "Getting Started" section, right before the "prerequisites" section of the guide. Assuming you are asking due to ESL being added. It is shown in the legend as having a blue bar. If memory serves me correctly, Lexy mentioned on discord that she forgot to edit that part of the guide when she did the updates, so would be adding/editing it during her next update.