Convert to Mesh from Curve on Blender

Prerequisites

• Blender v2.93
• macOS Big Sur v11.6

Steps

Click Object Data Propertiesthen type a value in Extrude filed.

Enter 0.1 as an example.

Click curve object in Object Mode.

Click Object > Convert > Mesh.

Click vertexes in Edit Mode.

Run Fill (Face > Fill).

Result it.