For prototyping we usually see 2 technology to make sheet metal parts.
Prepare the flat blank by laster cutting, then bend the shape on a bending machine.
It is very fast, and save cost of tooling.
Make the flat blank by laser cutting, and then bend the flat block in a forming proto tool which is made for the part. The mold can be made by simple mateiral like ABS, Aluminum.
The tolerance is higher than bending machine, while it can make larger quantities.
For very complex or tight tolerance part, mass production, we can make a serious molds to make the parts without sencordy machining.
The production is very fast once the tooling is approved,