20 Explorer 2.3l P0304 misfire

Need advice: I do have cylinder 4 misfire issue after I changed the spark plugs on my 2020 Ford Explorer limited 2WD 2.3L FI Turbo DOHC 4cyl . I tried to change the spark plug with the new one, and it didn't solve the problem. I tried to swap the coils, and the problem didn't solve it. I kept getting engine light and code P0304. Before i started this repair, the car was running smoothly. But now till 2000 rpm the car is shaking. I don't know what the issue is and need some advice. Thank you