Are steps into an outside door into the bedroom required if there are three other doors to the outside?

Steps depend on the height of the drop and would be also detailed in your local building codes, so I would suggest you reach out to the building department in your area or try to find those building codes online to reference.

I think it will come down to what the building codes are and if they meet the minimum safety requirements. I would contact your local county building department and inquire with them. Best wishes, Sean

Subject to local building codes, any change in level greater than 8 inches will require a step or stoop. It is not a matter of fire exit, but of trip and fall prevention.

It may also depend on the type of mortgage, FHA has some specific requirements but I'm not totally clear about the scenario you are describing.