It would also be useful to know which model you drive.
There seems to be a difference between the way they name them between US and Can, but the L model consumes less than the EX and the EX consumes less than the SX.
I recently got an SX model and I averaged between 35 and 40 mpg so far.
Being a newbie with my Niro, I can only give suggestions. My guess is that you could always have a look at the acceleration and deceleration. When I can, I try to accelerate slowly and thus use only the EV and I try to avoid breaking fast, instead I release the gas if I see that I must stop either way. That is not always possible and in winter, when I start the car, it will never be EV only. Partly because of that, I noticed that so far, in winter, short trips (less than 5) tend to consume more than moderately long ones (20km)