Use case or problem
Canvas seems to not respect the expand/collapsed state of bulleted sections, whether in existing notes or in cards.
Even if you collapse a section while editing, as soon as you “exit” the card or note, it reverts to fully expanded state.
Proposed solution
In your standard Obsidian note, expand/colllapsed state is “remembered”. Behavior in canvas should be the same.
Current workaround (optional)
None that I can see.