Using Chromium (tested 108-111) with Vulkan enabled and sandbox disabled (so that chromium can access the nvgpu kernel /proc nodes), chromium Vulkan renderer fails to initialize 3 times before falling back to the OpenGL based renderer on L4T 32.4.X-32.7.X
You can launch chromium with vulkan enabled and sandbox disabled from command line like so
L4T 32.3.1 does not have this issue and Vulkan successfully initializes in Chromium.
I am aware that the userspace GPU drivers were rebased to be based on the desktop 418 driver series with 32.4.X and have note been rebased since in the L4T 32.X.X series.