I´ve chosed do go with option1:
From Rocky To LInuxMint:
[root@rocky /]# ssh-copy-id
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/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already...