that’s correct, it’s mentioned by Camera API Matrix.
BTW,
you may try with nvv4l2camerasrc plugin as an alternative way to test your YUV camera stream via gst pipeline.
for instance, $ gst-launch-1.0 nvv4l2camerasrc device=/dev/video1 ! 'video/x-raw(memory:NVMM),format=UYVY,width=1920,height=1080,framerate=30/1 ! nvvidconv ! xvimagesink