A lot of plants aren’t pollinated by bees. There’s pollinator wasps, flies, moths, butterflies… even birds and bats are pollinators
My pawpaws (Asimina triloba) mainly need (house) flies to pollinate. They make their flowers look like meat. I have a couple 100 foot rows of them, it's tricky to get good pollination.
edit: Just saw your reply to the other guy, actually I'm in Ontario, any chance I can get a fruit or two :) ? I've been wanting to try it