Hey @thefierycoder,
As of now, there isn鈥檛 a feature for API forking as of now. If you鈥檇 like to work with an API on a public workspace, there is an option under the Define tab to copy the definition. You would need to copy the definition and create an API in your own workspace.
The good news is that this issue is already reported - Version Control for APIs 路 Issue #6914 路 postmanlabs/postman-app-support 路 GitHub. Feel free to add a +1/thumbs up and with your feedback to this thread.
Thanks!