Not airfryer related but we always cook beef in our slow cooker Cook on Max 4.5/5hrs cut a few carrots in big chunks place in the bottom sit joint on top No liquid required Leave alone,once cooked /cool/place in fridge overnight then ready to slice If needing it hot place slices into a oven tray cover with heated gravy place in preheated oven then serve The best/moist/tasty beef ever,every time,same cooking method with a leg of lamb maybe less cooking time than the beef depending how you like it,ours 3.5/4hrs
I tried a silverside joint in the slow cooker but it was really dry, I think it would have been best totally covered with stock rather than an inch at the bottom.
Enyaq EV