VTK Extrude Polygon Points and Holes Issue

Sir my main aim is to export these shapes as OBJ, GLB, GLTF etc.
When I export GLTF/OBJ, the shape is fine. There’s no issue with appearance.
The only problem now is there is no UV inside polygon mesh. So my model in other programs doesn’t have textures because there is no UVs
It seems like I’m missing something.
I’m completely new to it, if you have any idea regarding this, it would be really appericiated.
Thanks