I was quite proud of myself when I brought Simon Welker's obsidian-remarkable[0] plugin back to life a few months ago. It's one-way screenshot sync, but the experience is stellar (single shortcut, sub-second later you have a cropped, transparent screenshot of what's on your remarkable screen with no toolbar etc). I find it really useful for both staging meeting notes into Obsidian before summarising them, and for adding monochrome 'brutalist hand-drawn' graphics to my personal documents.

[0]: https://github.com/cobalamin/obsidian-remarkable