I haven't seen a stove yet in Germany (residential at least) that can't cope with all the phase inputs tied to the same phase.
They are just 3-phase because the utility demands 10+ kW loads to be 3-phase loads, and they often exceed that slightly.
Check out the install guide on e.g. some IKEA built-in models, specifically regarding the wiring instructions.
And US residential does have 240V single-phase available.