There are food historians who can do a better job of explaining an answer to this question. As I understand it, BBQ is just one small segment of foods classified as Soul Food. Using Wikipedia, the following came up under soul food meats. Most are fried or boiled:
Meats
Country-fried steak, with baked beans and mashed potatoes with white gravyChicken gizzards, batter-fried
Chicken livers, batter-fried
Chitterlings ("chitlins") (the cleaned and prepared intestines of hogs, slow cooked and often eaten with vinegar and hot sauce; sometimes parboiled, then battered and fried)
Country fried steak, also known as "chicken fried steak" (beef deep-fried with a crisp flour or batter coating, usually served with white gravy)
Cracklins (commonly known as pork rinds and sometimes added to cornbread batter)
Fatback (fatty, cured, salted pork; used to season meats and vegetables)
Fried chicken (fried in grease with seasoned flour)
Fried fish (any of several varieties of fish—especially catfish, but also whiting, porgies, bluegills—dredged in seasoned cornmeal and deep fried
Ham hocks (smoked, used to flavor vegetables and legumes)
Hoghead cheese (made primarily from pig snouts, lips, and ears, and frequently referred to as "souse meat" or simply "souse")
Hog maws (hog jowls, sliced and usually cooked with chitterlings)
Meatloaf (typically with tomato sauce)
Neckbones (beef neck bones seasoned and slow cooked)
Oxtail soup (a soup or stew made from beef tails)
Pigs feet (slow cooked like chitterlings, sometimes pickled and, like chitterlings, often eaten with vinegar and hot sauce)
Ribs (usually pork, but can also be beef ribs"
Google "Origins of Soul Food" and you'll get all kinds of stuff

