Hi @AlessandroGi1
Unfortunately, I am not able to find any document but it seems when nodes/content is converted to MD file, there are validation/rules ,which omits the other data.
I have seen same in document based authoring , where I tried to add a status or project report table but those were not rendering.
If you have a use case, you can share with me, I can check with Adobe EDS Team
Arun Patidar