Is it possible to get a Screen Space - Overlay Canvas to show on a second camera as well?
Overlay isn’t tied to a camera. So when you say second camera, can you explain what you are trying to do? Adding a second camera to the scene should have both showing the overlay without issues.
I’m using the Chromecast plugin (Overview | Cast | Google for Developers) and have added a second camera to the scene, in order to show game on second screen. That works fine, but I’m also wanting to show that canvas on the second camera as well, which is not happening.