Quest + LWRP/URP: MSAA not working

Pretty much as the title says, I'm using Unity 2019.2.14f1, Oculus Integration 1.43, LWRP 6.9.1.
Setting MSAA in the LWRP settings to any value (2x, 4x, 8x) does nothing. All cameras have MSAA set to Use Pipeline Settings. OVRManager has Use Recommended MSAA set to false. I'm not using any PostProcessing package. What am I missing?

EDIT: not totally working either on 2019.3.0f3 + URP, see later replies.