Height Map for a Small region – April 15, 2023 at 02:27PM

Hi everyone,
I am game developer and I am recreating an Institute in a game it’s roughly 750x750m,
I need a source where I can get elevation data to recreate terrain in the game engine.
I tried using the path in google earth pro, and convert it to .gpx etc using gpsvisualizer.com etc, but i couldn’t get good results.
I also tried using global mapper pro but it’s still not much helpful, I spent 3 weeks sculpting terrain but I couldn’t match the goal i wanted.

any tips for me?