Can you cook on a fire pit? Sure you can. It doesn’t make any difference if it’s propane-fired or a traditional wood burning pit… cooking is cooking. And you can do a lot more than S’mores, hot dogs and hamburgers.
I recently got a Camp Chef two-burner “Explorer” camp stove and a “barbecue grill box” for use while camping and during power outages (that are somewhat common during New England winters or hurricane season). What makes the Explorer different from a traditional BBQ grill is that it has two 30,000 BTU burners but no grilling surface. Without the BBQ box or other optional accessories, pots and pans are needed for cooking.