First, try unplugging the negative battery cable and reset your trucks adaptive memory. Here is a how to article: https://www.ford-trucks.com/how-tos/a/ford-f150-f250-how-to-reset-adaptive-memory-359981
If resetting the adaptive memory doesn’t work, check the functionality of the odometer. If the odometer is racking up miles during a dead stop, I suspect it would be your speed sensor. This is located on the side of the transmission.
If the odometer is working correctly (i.e. not racking up miles while the truck is stopped), then the problem is most likely the instrument cluster. You can replace the cluster, or try to repair it. If repairing, I’ve heard people have had success replacing a bad stepper motor, but this would require some circuit testing and soldering skills.