I've been using markdown notes for a short while, but some shortcomings, such as a lack of collapsible points and styling, make me want to (re)consider other notetaking solutions.
Personally I use other methods for styling within markdown, for example emoji, tags, link formatting with brackets (for things that are not really links), etc.
I also take any list that's longer than 8-10 items and break it up by category or reorganize it so it's less visually overwhelming.
Otherwise you may find it helpful to look into more rich-editor-style notetaking solutions like cherrytree or Notecase Pro. The latter is proprietary but I used it for years and was very happy with it. Good luck in your search.
It supports collapsible sections just with the Markdown syntax but it’s also highly-extensible in any way you wish. I think Bear and other editors support Markdown collapsible a as well.