Cut chicken into 3/4" pieces and mix with soy sauce, rice wine, sesame oil, salt and pepper. Let sit while preparing rest of ingredients.
Turn Instant Pot to "Saute" mode. Add oil and once Instant Pot reads "Hot," add scallion and ginger. Saute a few minutes until fragrant. Add marinated chicken and saute until lightly browned. Add drained sweet rice, sausage, mushrooms, and shrimp. Saute a few minutes to release a little oil from sausage. Add reserved mushroom soaking liquid (strained) and enough chicken broth to total 1 1/2 cups of liquid, soy sauce, rice wine, sesame oil and pepper.
Hit "Cancel" button and then select "Rice" mode (12 minutes). Natural release for 5 minutes, then quick release.