Can you explain more about what you would want to see? There is the Excalidraw plugin that allows you to write handwritten notes inside of Obsidian. It should also be possible to add handwriting recognition as a plugin.

If you're on macOS/iOS a lot of this is now at the OS level, and has gotten really quite good.

Couldn't you just use your preferred inking app, then export as image?

I ask this as someone who much prefers atomization with good interoperability to bloated everything applications (and who has a phone and laptop with active stylus.)