The projected range on a full charge correlates in large part to recent driving efficiency. What Energy Consumption values are you seeing in your car's ECO Driving > Driving History screen?
I mentioned this in another recent thread, but there several factors that determine the predicted range that you see displayed -- state of charge, heating/air conditioning use, exterior temperature... but the most significant is your recent driving efficiency. Even if charged to 100% each night, your predicted range may vary from day to day depending on how efficiently you drove the day before.
Your car tracks energy consumption cumulatively. The only reliable way to see your recent efficiency is to reset the calculation via a button on the steering wheel (I do that each morning out of habit). I'll try to find photos that illustrate this point.
Kia Soul EV+, Porsche 928