I've heard good things about the LogSeq/Obsidian interoperability, but out of curiosity, have you tried the Outliner plugin for Obsidian? I haven't gotten a good sense of how the two differ.
Offtopic: It is such a nice co-incidence to meet you here on HN. I found you on YouTube yesterday while searching for Notion swipe files and then followed you on Twitter today. :).
O/T: I usually lurk on HN since I'm very developer-adjacent (my husband and most of my friends are engineers so I like to have stuff to talk about at dinner/parties), but this was finally a thread where I knew something relevant haha. Nice to meet you!