This tool uses Geometry Nodes to transform a curve into a Stitch Line. It's very simple to use;

you just need to append the "stitch.blend" to your scene,

select the "stitch" inside the "NodeTree" folder,

add a Geometry Node to a curve,

load the Stitch on the Geometry Node,

select a surface,

enter in edit mode with the curve selected,

delete the unwanted geometry,

set the depth to "Surface"

and start drawning.