What could cause this bent push rod (not a Mopar, but still…)

As correctly stated above, it is a common issue, in the LS style engines & Hemis. Any lack of oil pressure for whatever reason & a lifter will collapse completely & the pushrod jumps where it doesn't belong.
Particular to the Chebby at least into the mid/late '00's was the fact that the 4WD's used a tiny spin-on filter to clear the frt diff assy, it was restrictive & You couldn't screw around on the maintainance, they would cause low pressure in a hurry.
My Bud just went through this on His wife's Durango, #6, so......the common consensus there is an oil pump replacement that bumps output after changing the damaged parts.
If You plan on keeping it, do what Scampin said, otherwise.......