@NateDhaliwal It seems it doesn’t work exactly like that: “So, first posts get the toc, and subsequent posts get the regular topic progress widget.”. I just needed a reply for that Timeline button (not the timeline itself) to show up. But it’ll show the TOC, even if I scroll down to the second post, until I click on the Timeline button.
Anyway, this behavior is also OK on my side. Thanks a lot.