Hi @Bo
You cannot do this directly with MS Teams functionality at this time.
1) You can use a product called ShareGate:
https://sharegate.com/blog/sharegate-desktop-release-channel-migration-microsoft-teams
2) You can share your feedback with the MS Teams team:
https://feedbackportal.microsoft.com/feedback/forum/ad198462-1c1c-ec11-b6e7-0022481f8472
If this is helpful please accept answer.