Need Help with Arched Window Shape in Horizon Worlds

I'm building a wall in Horizon Worlds, and I'm having trouble making a circular or arched shape for the window. I want to cut a hole in the wall so it looks like a real window, but sometimes the shape doesn’t come out right or it looks off. It’s hard to explain, but the curve isn’t smooth or the window doesn’t align well with the wall.

If anyone has tips or examples on how to make a clean arched or circular window in a wall, I’d really appreciate it!