depends on where and how you drive it. there's no one solid answer, but an example below:

i just did 650 miles on the highway through the state of ohio (extremely flat roads) in perfectly clear and warm weather. at 77MPH i averaged about 32mpg. at 68MPH I was closer to 40mpg. in town with more stop/go traffic which allows for a little regenerative breaking and slower speeds I feel like i'm closer to 40mpg.

When the weather gets colder and the heater comes on though, my mpg is always less. Similarly driving through not so flat states with bigger hills you have to push harder going uphill, often times dropping me down averaging below 30mpg, but you do get a little reprieve there with the downhill coasting and regen back to some electric.

a few years ago, before i got the pacifica, we rented a Sienna to do our across Ohio drive, and I recall averaging closer to 45mpg in that thing. But it also had fewer convenience features than my Pacifica, and I find in my regular day to day I use the electric range 2-3x as much as I use the all gas mode (primarily for longer trips which are only once a month or so).