Are These Lugs Swaged To The Drum?

Yes, it's swaged.
My experiences removing the stud without removing the swage, damages/enlargens the hole to the point that the old/new stud will not be secure, it'll fit, but loose, and seem okay, till .
This will rear it's ugly head when trying to undo the wheel nut, the stud spins in the hub, then you can't get the wheel off.
This usually happens when the wife and kids get a flat tire, and are stuck on the side of the road, trying to get the wheel off.
Then some other bright one, after being towed for repair, tries to weld the stud into the hub without torquing the nut/drum/stud first , which will cause another tow when flat, for the same reason, weld cracks and stud spins!
My wrecker made that service call a few times back then.
Remove swage, or find a new hub first,
They are getting very rare, cuz folks keep ruining them, by not removing swage first.
Search it here .