This is a bridge generator using a geometry node in Blender. You can use the curve draw tool to make a bridge or manually place a curve.

The bridges are from Polyhaven.com

It's a geometry node modifier. There is nothing to edit in the modifier however I made it that way so you don't need to adjust anything.

the blend file is already set on the draw-on surface for the curve draw tool. If it's going through your surface you can check that.

Feel free to contact me if you face any issues.

I appreciate your support