There's been a few persistent issues with Dendron's current markdown preview:
page can get stuck
doesn't integrate with native markdown preview in VSCode
results in two markdown icons in the menu bar
etc
In order to provide a better user experience and also pave the way for more advanced functionality like embeddable pages and blocks (eg. roam), Dendron is working on its own markdown preview
You can preview it today by using the regular markdown preview with the 0.6.4 release
Currently, it supports rendering and navigating via wiki-links and is not at feature parity with Markdown Preview Enhanced