A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
Hi Kyra,
It’s not feasible to use PowerShell (or other Microsoft software/features) to migrate the data and keep the permissions intact. You would need to set up your SharePoint Online permission separately.
We suggest you vote this to UserVoice, this is the best way to make our products and services better for you and others.
Thanks for your understanding.
For 3rd party tool, welcome to community member to share their ideas.
Regards,
Cherry