"Fold All Regions" is not working on markdown

[kenng]

markdown collapse "Fold All Regions" is not working.

• VSCode Version:
• OS Version:

Steps to Reproduce:

1. define the region and endregion in a markdown file

## [ topic ] My Topic
<!-- #region -->
my content
<!-- #endregion -->

## [ topic ] My Second Topic
<!-- #region -->
my content 2
<!-- #endregion -->

2. run command >Fold All Regions.
   Result:
   Region is not collapsing.

Does this issue occur when all extensions are disabled?: Yes

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Fold all regions not working for VSCode (#46776)
• Add region commenting feature/ Collapse code by region (#26901)
• Collapse/expand regions does not work (#47308)
• Allow white-spaces after # for region folding in python (#44113)

[kenng]

Could be a duplicate issue of
Collapse/expand regions does not work (#47308)

[mjbvz]

Duplicate of #45118

You should be able to fold document areas by heading level. Folding regions in markdown were sort of an ugly hack we added before we supported proper syntax-aware folding