How to use UI with Stereoscopic videos in Unity?

I have to develop 360 experience in Virtual Reality Stereoscopic in Unity

When adding a UI to the Stereoscopic experience in Unity, it appears as if I have two UI's in the scene.

To solve this problem, I created two UI's with two cameras in the scene, the left camera can see the UI masked with the left layer, and the right camera can see the UI masked with the right layer.

And there are other issues I am facing as well with the POINTER in the Motion Controllers specifically. It starts with straight single line, and then splits into two lines.

this method of solving this issue is very tedious and takes a lot of time, and I have been given short time to implement 360 experience at my workspace. Therefore, I am looking for alternative ways that can be used to solve this issue.

Any feedback will be appreciated.