Possible blown HG; Yes
Possible cracked ( X,Y or Z) (Block, liner(s), head) yes. Only way to know, is to pull her apart.
Deck surface, which includes the condition of the liner. ( how much they stick out, and sealing condition of the gasket mating surfaces of the liner) needs checked.
Your cylinder head was probably due for new exhaust valves anyway..
Pull your dipstick. what's the oil look like? nice and black, or is it milkshake frothy? greyish to whiteish in color? That may let you know just how far the collateral damage went.
antifreeze in bearings for any length of time isn't good..
If you are showing milkshake oil, the possibility of cracked liners BELOW the rings (when piston is centered in the block) is also a possibility. (not the only place coolant gets into the oil) but must be checked regardless. The only time you'll see the crack is when piston is all the way down. Even then, the crack could be just below the top of the piston, but still above the rings. Impossible to see in an assembled engine.
a REALLY overheated diesel can and will cause piston scuffing.
When the head is off, look down- bore along the thrust sides for 'dullness' or discoloring of the cylinder wall.
This is common in a really overheated engine;
Sometimes, when the piston is all the way down in it's stroke, the skirts can be seen from underneath (oil pan removed) and the damage is visible from below.
When facing a known overheated engine, just fixing the cause of the loss of coolant is only part of the 'fix'. Not saying any of this did happen to yours, but prudent to verify it DIDN'T happen!
I'll add, the 'fix' depends on what you really want out of your Jeep.. Short term gig, or another trip to the moon?
Me, I'm already 4k into fixing a vehicle I paid 13k for only 4 yrs ago.. that if sold in perfect running condition tomorrow would bring 5-6k?? I'm not doing it for the NEXT owner!! I'm doing it for ME!
But on the other hand, I could go down to the dealer, and plunk down 25k on a newer 'good used' vehicle that was someone else's problem!!