If the presentation is to be of any level of quality, then if it is in the continental USA, USGS has 1 meter data that can be easily converted for use with UE5.
Most other countries have much lower resolution DEM data such as 30 meter.
The foliage in the scene can probably be done with Quixel assets.
And the buildings re-created in Blender/Max/Maya/etc.
That is the way that our local architects do it here in my city.