*Steps to reproduce:*
# Add open xr or mock hmd xr provider which has foveated rendering support to your project.
# in the player settings enable vulkan and xr settings enable foveated rendering for windows
# Attach script to a GO or camera in scene[^FR.cs]
# build and run
# compare to DX12

*Actual results:* 

When using Vulkan there is no change in rendering between FR 1.0 and 0.0 as seen when running with DX12

*Expected results:* 

Edges of screen display in lower resolution

*Reproducible with versions:* 

2022.3?  I didn't got back to 22.3 to test this yet

but open xr only on 2023.3+

*Not reproducible with versions:* 

*Can’t test with versions:* 

2021.3

*Tested on (OS):* 

Windows
*Notes:*
* currently mock hmd does not have this support merged into trunk but you can use branch foveated-rendering/d3d-vulkan from [https://github.cds.internal.unity3d.com/unity/xr.sdk.mock-hmd]
* open xr support is in PR as well https://github.cds.internal.unity3d.com/unity/xr.sdk.openxr/pull/891