Migrate primary storage post setup

Is there a supported way to migrate the Primary Storage after the server has been in use for a while? E.g. if I don’t configure my primary storage when I first install Nextcloud, could I then migrate the objects to AWS S3 and use it as my primary storage at a later date?

Regarding: https://docs.nextcloud.com/server/11/admin_manual/configuration_files/primary_storage.html#implications

Somebody asked this already this year, I can’t find it. But I think to remember that you need to set this up during installation and that you can’t migrate later.

a bit older: Switching primary storage