Update to light weight scrptable render pipline 4.8,Only one camera can rendering to screen.

[Karearea]

They’re currently looking at a solution to this based on high demand- I think there’s a plan to release the replacement system at or just after GDC in a few weeks.

Lightweight Pipeline HDR + Postprocessing Bloom with second Camera

I would check out a newer version of HDRP shadergraph has been supported for a while and the last few version also have a HD Lit master node letting you use most of the advanced HDRP shading features in shadergraph. As for the camera clear flags being limited, we are working hard on the feature now that will make you forget about needing them, we will be showing it at GDC with a LWRP package(and example project) available around that time too.