I am not sure if this has been asked before, or maybe it's me.

I have a 2020 F150 XL. For the first year or so I had this truck, when I fill the tank, the remaining miles would say between 530 and 540. Now, on average, when I fill up the truck, it never says over 500. I cannot recall the last time it was. In fact, I filled up today and the remaining miles said 466.

I have done all the oil changes every 3k miles, plus replaced the fuel and air filters regularly. Any ideas why this is happening?

Thanks.