UV unwrap triangles / flatten curved surface

Hi there,

Some time ago I made a piece of a prism turned towards the sky and now I want to make it in metal, so it had occurred to me to make a UV unwrap on the sides so that I had them flat, then vectorized them and sent them to a laser cutting machine for later mount them.

Prior to this, I was trying to do it with sheets of paper and I'm seeing that the sides don't fit. Reading through the forums I have seen that for an unwrap to be a faithful flattening I have to do the step of "follow active quads" but this object that I made is made of triangles and when I perform the action of "tris to quads" it does not transform all of me the triangles.

If someone could help me I would be eternally grateful since I am very lost with the possible solutions