Dear Bart Plessers,
Good day! Thank you for posting to Microsoft Community.
Copying a folder structure along with its items in a SharePoint list is not as straightforward as it is in a document library due to the difference in how lists and libraries are designed. Lists primarily handle structured data, while libraries are more about file storage. However, I sincerely recommend you try posting in this specific channel Microsoft Power Platform Community. Members and engineers over there are proficient in the knowledge of Power Automate issues and may have a workaround using this tool. We are sure that our experts from that team will respond to your query effectively and accurately.
Thanks for your understanding and cooperation! Hope you have a nice day!
Sincerely,
Ralph | Microsoft Community Moderator