I don’t cook chicken on the stove at all lowkey I only cook it in the oven or fry it in cornflakes. When cooking in the oven set for 425 and put in a 8x8 casserole dish so it’ll hold the fat and the seasonings/sauce if you put it on there and cook for 25-35 minutes (depending on your oven) or until it reaches 165 with an instant read thermometer
Are you drying the chicken a bit before cooking— as in, blotting it with a paper towel? Do you cut into it or pound it to flatten it more? That can greatly help it cook more thoroughly. Add seasoning closer to when it’s finished to avoid smoking those, and lower the temperature a bit more (this is where pounding the chicken can cut down on cooking time as well). If you have one, you can also use a lid on after you cook one side to help it cook through and not dry out as much in flavour/etc.