The newer one (URP) is already in its second rewrite after ditching the initial version (LWRP). They also completely split the post-processing stack into two incompatible stacks depending on whether you're using URP or HDRP, then backtracked and are attempting to merge them into a single stack again.

So while maybe they'll get it all fixed soon, based on their track record I'm pretty cynical and bet it's more likely in 2021 or 2022 they'll announce yet another overhaul of the rendering stack(s), probably unifying them back into one stack or something.