2023 CRV Hybrid Sport Touring LOW RANGE AFTER FILL UP!

I have a 2023 CRV Hybrid Sport Touring that only give me 390/409 miles to a full tank! It only has 14,500 miles on it. Car runs with no problems, no check engine light. I've tried different grades of gas, to no avail. I used to get 459, 449, and now 390, 409. My mpg is 26/31 I keep it on ECO. I've tried Normal and still the same. PLEASE HELP!