NEC code requires 2 separate 20 amp circuits in a kitchen. Usually they split the circuits across a countertop or window. It's been code since ... as far as I can tell, pretty much forever. Unless you're living in a house that is either non-compliant or built before NEC was required, then it should have this kitchen arrangement.
Otherwise, running your microwave, toaster, and coffee maker at the same time would likely trip the breaker.
And obviously, the stove/oven is on its own circuit unless it's gas.