Two (of many) things that will change EV range estimations: climate and driver’s right foot.
Much of the current battery tech is temperature dependent. Both colder or hotter temps than ideal will reduce EV range but colder has a bigger effect primarily because the chemistry is less efficient while the vehicle/driver require more heat that is (in EV mode) only supplied by the battery.
Keeping a close eye on any driver’s scores/displays can tell you if the right foot has anything to do with it too.
If you think it’s a hardware/battery issue, you can get a test reading done at most Honda dealers that can be compared to the new rating.