Over 20k mileage at the end of 3 years lease,it will be no extending. My car last summer at the end of 3 years,was about 17k was put into a 2 year extension. Unless goalposts have been moved since or i have missunderstood the op.
That’s funny 15 months ago, my car was on 55,000 miles and I had a 2 year extension. Infact I dont recall them asking me my mileage