I am new to the Obsidian app, but I agree that showing Markdown headers alongside file names could be genuinely helpful. Especially in the Zettelkasten workflows.
Thanks to the former posts I found file-explorer-markdown-titles quite handy, and I modified it a bit to show both MD header (essentially, the first one in the document) aside with filename in the file explorer. And this is a preview (the detected header on the left, while the file name on the right, dimmed & italic).
The plugin is just a straightforward demo now. Since it is just about rendering the title, it will not affect document contents and could work well with other plugins. Open to any kind of comments & suggestions!
Here is the link to this tiny project obsidian-md-title-sidecar. I have not figured out how to upload it to the marketplace, so it could only be downloaded via Github Release and installed manually. I will do it when I got more time😌