https://www.reddit.com/r/NotionSo/comments/fanyjv/sketch_pad_draw_in_notion/
Here's a low tech, down-and-dirty sketch pad "/embed". Inspired by whiteboards, chalkboards, sharpies, and, of course, Notion! Save your drawing by downloading to SVG and drag back into notion. (Copy and paste is work in progress)
No login, no signup required! Highly experimental. But gives you the idea of what this Notion feature could look like. If people are interested, I can get a stable release up.
https://www.notion.so/mclarkestudio/Sketch-Pad-Draw-0c786bb3ff6a45d388aff17a77e3d344