Brussels Sprouts and Steak Stir Fry

Name: Brussels Sprouts and Steak Stir-Fry
Ingredients: 3 tablespoons oyster sauce; 3 tablespoons reduced-sodium soy sauce; 2 tablespoons unseasoned rice vinegar; 4 tablespoons vegetable oil, divided; 1 pound brussels sprouts, halved; 8 ounces flank or skirt steak, thinly sliced against the grain; Kosher salt; 4 scallions, whites chopped, greens sliced; 3 garlic cloves, sliced; 2 tablespoons chopped peeled ginger; 2 medium carrots, peeled, thinly sliced on a diagonal; 1 Fresno chile or jalapeño, sliced into rings; Steamed rice (for serving)