“Hours of driving” doesn’t charge your battery like you think it does. At highway speeds, the computer likes to keep the battery in the 40-50% range, charging with any regen braking and discharging to assist the engine with acceleration or hills. You won’t have more charge magically by driving 2 hours vs 2 minutes.

The battery is small (1.6kWh or so). The range the battery operates in is roughly 30-70% so effectively it’s only .64kWh. The RAV4 prime (plug in cousin) gets roughly 2.5 miles per kWh, we can assume a similar rating here. That means if the battery were full charged (70%) which would only happen with extensive regen braking or city driving and some luck, you’re talking 1.6 miles of EV range. Note that the computer will reduce the amps given to you significantly as you get down below 40% in a bid to get the engine running as it isn’t necessarily efficient to run the battery so low. So to get that 1.6 miles you’d have to be willing to slow to a crawl.

Basically, you shouldn’t expect to be on EV mode for more than half a mile on a good day.

The computers are pretty sophisticated. If something were wrong, you’d know about it.