How to configure the chromium build via the qtwebengine recipe

Rajesh_M

I need to add the following flags to the chromium build in the qtwebengine .How and where can I add these flags in the meta-qt6 layer ? .Also where the chromium build flags are configured in qtwebengine ?

use_v4lplugin=false \   
use_linux_v4l2_only=true \
use_v4l2_codec=true \
proprietary_codecs=true \	
ffmpeg_branding="Chrome" \

Please help me solve this .
Thanks in advance for your help