When folks talk about their cadence, it is often what they see at the most spinny moments, or even what they wish they saw.
Average cadence depends on the amount of hills, as very few climb at 80 or more, and many don't have the gears to.
I live in a pretty hilly area, but also follow folks in flatter ones, & I can't recall ever seeing average cadence over high 80s- but it probably happens on flat rides.
I'd suggest that you get an 11/32 cassette, and if necessary a Roadlink bit to make the RD work- that gives more range to spin up the hills which
can set the tone for higher cadence elsewhere.