Hello @Pellosniemi,
I hope you're well. I saw you posted this a couple of weeks ago. Have you found an answer yet?
And just to be clear, are you trying to export your tables/apps/flows/chatbots etc from one Dataverse for Teams environment to another Dataverse for Teams environment within your tenant, right? Such as you're moving everything from "Small Sales" environment to "Big Sales" environment.
I thought about the "Copy" option in the Power Platform Admin Centre. I looked at this Microsoft Docs and unfortunately this isn't possible.
I saw this YouTube video from Tomasz Poszytek. The tagline for the video is: "In this video I will show you, how you can export your custom solutions built using Microsoft Dataverse for Teams and then import then into another Team or another Tenant."
He moves tables/app/flow/chatbot from one tenant to another tenant, so I think this is exactly what you're looking for. Please let me know if this helped.
Thanks very much,
Garry