Hi @jordio. You could do this which works the same for both viewports.
import omni.usd
ctx = omni.usd.get_context()
# Makes everything unpickable by specifying the stage's PseudoRoot.
# More flexible too because you can make specific prim paths unpickable.
ctx.set_pickable("/", False)
I’ve reached out to the devs to see if they have any other guidance.