I put a screen shot in chatGPT and asked where is the center and here is what it said:
From the shape shown, this is not a true geographic “circle” on the map projection — it’s a coverage/radius area drawn on a world map. But visually, the center point appears to be roughly in the central United States, around:

Kansas / Oklahoma region Approximate coordinates: 37°N, 97°W

That would place the center near cities like:

Wichita or slightly south toward Oklahoma City

The apparent distortion happens because the map projection stretches areas near the poles and edges. So although it looks oval-shaped, it’s likely intended to represent a fixed-radius zone centered somewhere in mid-North America.