kartonage
There have been stairs mapped here for about 12 years. Most navigation engines may route you over stairs if it's significantly faster. If you have heavy e-bikes you should look into navigation providers who can take that  into account or where you can make rules for navigation.

For instance: https://bit.ly/3leMk3L (in the top left you can turn on the profile for e-bikes and navigation will change.

If changing to a different provider is not a choice, consider using the car profile.