'Unity AR UI not showing up

I have created a simple Unity AR Foundation app which places objects on a plane whenever the screen is touched. I would like to add some UI so the user can press a button rather than anywhere on the screen.

I have followed several different tutorials which seem to be doing mostly the same thing. I right-click the Hierarchy -> UI -> Button. I have scaled it so it should fit my mobile screen and anchored it to the center so it should be easy enough to find.

These are the canvas settings:

Canvas settings

Might the UI somehow be hidden behind the camera feed from the AR Session Origin -> AR Camera? Am I missing any steps to anchor the UI to the screen?

As you can probably tell, I am very new to Unity but I feel like I have followed the tutorials for creating a UI, but it simply won't show. If you need more information, please just ask and I will provide.



Solution 1:[1]

Not sure but sounds like you might need to have that Canvas Scalar to scale with the screen size. Change the UI scale mode to Scale with Screen Size.

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Source: Stack Overflow

Solution Source
Solution 1 Anil Sapkota