So, this looks like it's AI art.
They don't look bad, though, so let me give a suggestion on how to do this:
If you're going to use an AI art engine to make stuff, please submit a LOT of it, like DreamingOfLight does. Curate the work, by making sure that the angle in the isometric is identical on all the buildings, and that the footprint / size of the sprite matches as well. And label it (like, "the 120 degree pack).
I don't mind AI art when it's used as the tool it is intended to be. So...I wish you well on your artistic journey.