Is it the role of the tool (in this case copilot) to include the license information? Or is it the responsibility of the organization using the code to make sure that it wasn't copied from somewhere?

What if, instead of a tool, you had a random consultant do some work, and it was found out that he asked a ton of stuff on Stack Overflow and copied the CC-BY-SA 4.0 answers into his work? What if it was then found out that one of those answers was based on copying something from the Linux kernel? Who is responsible for doing the license check on the code before releasing the product?