To the best of my knowledge, there are just 3 versions of SW. Link summarizes the differences, but go on SW site for more detail.
https://www.javelin-tech.com/blog/2018/07/solidworks-packages-comparison/
Module is kind of misnomer because each SW version looks identical other than it has extended capabilities, so basically more stuff on the menu. But they work seamlessly with one another in one familiar session. For example Mold or Surfacing tabs appear as unique menu tabs within Standard but they gather logical common commands under that heading for workflow efficiency. Sometimes module can mean a 3rd party plug-in app. Sometimes it means a standalone program with completely different look & functionality but supports specific data standards. Rhino is like that. They module you to death.
Anyway, I don't do much sheet metal but I have watched training videos. I am confident that the capabilities built in the lowest SW version (Standard) is incredibly powerful. You would be hard pressed to come up with an enclosure with all kinds of sheet metal features like bend & weld allowance, tabs, louvers.. that it couldn't handle. And unlike some cheesy packages you can start with a complex solid because it integrates with surfacing tools, yet another 'tab'. Now Premium on the other hand (the big boy, big$ top version) has 'advanced surface flattening' if that is what you mean. But that capability is much more powerful that unfolding even complex typical sheet metal enclosures. And of course it has all the other stuff like advanced simulation & motion analysis & ...