PubkeyAuthentication yes and
AuthorizedKeysFile .ssh/authorized_keys
are both enabled.
Edit: Log:
Oct 31 23:21:54 nanopineo3 sshd[14043]: debug2: userauth_pubkey: authenticated 0 pkalg rsa-sha2-512 [preauth]
Oct 31 23:21:54 nanopineo3 sshd[14043]: debug3: user_specific_delay: user specific delay 0.000ms [preauth]
Oct 31 23:21:54 nanopineo3 sshd[14043]: debug3: ensure_minimum_time_since: elapsed 5.875ms, delaying 4.758ms (requested 5.316ms) [preauth]
Oct 31 23:21:54 nanopineo3 sshd[14043]: debug3: userauth_finish: failure partial=0 next methods="publickey,password" [preauth]
Oct 31 23:21:54 nanopineo3 sshd[14043]: debug3: send packet: type 51 [preauth]
Finaly got it. Problem was the RSA key. Generated a new one with
ssh-keygen -o -a 256 -t ed25519 -C "$(hostname)-$(date +'%d-%m-%Y')"
and copied it.