By live preview, do you mean WYSIWYG editing? There is an issue open about that and you can +1 it to show you support: https://github.com/dendronhq/dendron/issues/2778. As for the VSCode plugins, you can try Markless (https://marketplace.visualstudio.com/items?itemName=tejasvi.markless). It's not Typora in any means, but it might fit your needs.