How do I face a WorldSpace HealthBar towards multiple cameras?

So I have a split-screen game with four cameras… Each player has a healthbar above their character and I want to face it to all cameras so that the width is always the same. Is there a better way to do it than to create multiple Healthbars with different LayerMasks?

Try doing this in OnPost Methods …
For example OnPostRender.
As little data, for example, on which SRP do you make the game, and so on.

If the health bar(s) is rendered using a Billboard Shader (with necessary tweaks), then each Camera will render it in the same way.