WebGL rendering pipeline issues and UI/UX?

Is there going to be an auto-magical way to convert from Other Build Target to WebGL build targets that switches HRP to LRP or SRP?

Or will WebGL work with HRP?

Also getting editor errors when DX11 set as renderer and WebGL does not render to DX11.

In addition the UI/UX for transitioning between rendering pipelines and editor graphical API seems hard to find, where should the RP UI be in the build UI or under Rendering?

Also the modules UI why not have an Update All option, that auto-magically upgrades the modules in the correct dependency order or even all together e.g. download, install, build?

You can only have one SRP per project, so switching between render pipelines depending on build targets is not a thing.
And WebGL will never work with HDRP due to limitations of the WebGL 2.0 standard and the features it supports.

So a studio would need two mirrored projects if they wanted to make a version of their game with the HRP and LRP?

Yes.