Instead of gushing over this staple in a comment, I thought I might do a related post covering what Americans mean when we say "biscuit" and/or "gravy".
Biscuit: can be "cut" or "drop" categories.
Cut biscuits are often (usually?) a laminated dough. Not as extreme as phyllo or puff pastry, but still has distinct separation of fat and dough to provide flaky goodness. Rolled out and cut with a ring, hence the name. Not the only way to make them, but that's the very basic explanation.
Drop biscuits have a very wet, loose dough, almost a batter. Scooped and "dropped" onto baking sheet, or used similar to dumplings to top a stew or pot pie analog family meal. A common term is "cat head" biscuits, because that's the target size when baked. America's Test Kitchen has a fantastic recipe that has sour cream in the dough.
Gravy: gravy is a spectrum. The most common variety, especially for biscuits and gravy, is "sawmill", or "breakfast" gravy. Loose, crumbly sausage, usually very herby and sage-forward, is browned well in a skillet. Prominent flavor is black pepper as well.
Flour is sprinkled in and cooked in the fat with the sausage (similar to flour and butter roux), then milk is gradually stirred in (pour too fast and it'll be lumpy), then stirred and reduced to desired thickness.
My family would add homemade creamed spinach, like what's popular in steakhouses; lots of garlic goodness, and provides subtle flavor change.
"Redeye" is my personal favorite gravy, though it's not often seen for biscuits and gravy. Instead of sausage, fond and flavor source is a thick ham steak that's been fried in a skillet. Instead of milk, coffee is the liquid base.
Creamed chipped beef over toast is a related dish; called SOS by military veterans and family. Chipped beef is thin dried processed beef; used as a basis for white gravy like aforementioned sawmill. Served over toast. Military toast is typically indistinguishable from roofing shingles (in color, texture, and odor), and the creamed beef is less than appealing in appearance, hence the name "Shit On a Shingle". Also the Morse code distress signal, which you'll be using after enough time on Army chow.
These all fall into similar formula as most comfort foods; starch topped with meat in a rich sauce. Carbs, fats, proteins, lots of seasoning.
Fufu and egusi, currywurst mit pommes, poutine, donburi, shrimp and grits or red beans and rice, carbonara, loco moco; everybody has the same needs when about to do farm work, or after a good night at the bar.