Also the video mentioned J-10C replaces Mirage 5, who had role of nuclear strike. It is likely J-10C could be in same role.
When a platform change occurs in a squadron their role can also change (this is normal.)
Also, 7 Squadron (one of the 2 squadrons where the J-10C is headed) flies Mirage III ROSE. That's a multi-role squadron deployed in Karachi (at the coast.) It may remain multi-role or may switch to Air Superiority.
The other squadron I heard will be deployed at Kamra, that's Northern Air Command. This is where Rafales are expected, out of Ambala AFB. This squadron would most likely be Air Superiority I'd think.