Preheat your oven to 350°F (175°C).
In a large skillet, heat the olive oil over medium heat. Add the diced onion and green bell pepper, sautéing until they are tender (about 3-4 minutes).
Add the ground beef to the skillet. Cook until the beef is browned and fully cooked (about 5-7 minutes). Drain excess fat if necessary.
Stir in the Sloppy Joe sauce, garlic powder, salt, and black pepper. Let it simmer for about 3 minutes. Remove from heat.
Transfer the Sloppy Joe mixture into a greased casserole dish, spreading it evenly.
Open the can of biscuit dough and cut each biscuit into quarters. Scatter the biscuit pieces over the Sloppy Joe mixture, ensuring they're evenly distributed.
Sprinkle the shredded cheddar cheese over the biscuits.
Bake in the preheated oven for 25-30 minutes, or until the biscuits are golden brown and cooked through.
Remove from the oven and let it cool for about 5 minutes before serving.