I stumbled across @FlightOfOne 's about post about enabling post processing on the main camera blocks out one of the eyes (in my case it is the right one) which @Shaunyowns claimed has been fixed in URP 7.5.
Still encountering the same issue, I was about to post about it when I realized my main camera was set to overlay since we use another camera as base camera for the background in our project.
Switching our main camera to base luckily fixed the issue in URP 7.5.3 but the question still stands: Will the issue be fixed for overlay cameras?
Restating the problem for clarification:
Enabling post processing on the main camera (being an overlay camera) blocks out one of the eyes, while enabling it on another overlay camera fixes the issue but thus applies the post process effect to everything, including UI. Switching the main camera from overlay to base render type fixes the issue but is obviously not what all developers might want.
Cheers.
Edit: Switching my main camera to base and enabling post processing seems to have broken post processing on my overlay camera now, which not only renders to the left eye again. It seems this is still a bit messy