There are at least two threads on this topic (feature request from March 2022, my thread in the help section), but it doesn’t appear much has happened or will happen.
Syncing folded status is not a feature now and it’s not, AFAIK, under development.
Would anybody like to make a plugin for this? 
If not, how hard is it for a non-technical person (me) to learn to code enough to make such a plugin?
Since this already exists for in Dynalist, why doesn’t it exist for Obsidian?