Not a Chrome tab
The real desktop.
Six digits.
Install the app on the PC you want to see. It captures the whole screen (AnyDesk-style), not a browser share dialog. Your friend only needs this website.
How
1. Host: open the PassDesk app → Share this PC → copy the 6 digits.
2. Guest: passdesk.vercel.app/join → type the code.
3. Click the picture, then move, click, and type.
4. Host: close window = tray. Right-click tray → Quit to turn it off.