I’ve tried a few TOC plugins mentioned here, but I didn’t find them quite satisfactory for my flow.
However, I’ve recently discovered this sticky headers plugin and I’ve been really enjoying it. I think it’s a nice alternative to having a dedicated Contents panel: GitHub - yoyurec/logseq-sticky-headers: 📌 H1-H5 headers stick on content scroll. Logseq pligin
If you like that plugin, then it also goes very nicely with this plugin to easily modify heading levels: GitHub - vipzhicheng/logseq-plugin-heading-level-shortcuts: A very tiny plugin for Logseq to bind shortcuts to change heading levels