I checked, I have a
- 256 bit RSA key, SHA256
- 256 bit ECDSA key, SHA256
- 2048 bit ED25519 key, SHA256
and all three work when using SSH into a box without password ( when the .pub is added to the authorized_keys file ).
I will re-check again with different keys and brand new stb with fresh OpenPli flash to it tonight. Ill let you know. Thank you for the support so far.