Thank you so much @fullyint ! Doing a setup with Ansible downgrade now. And it is running! Never thought it was related to the Trellis connect test always showing root as failing to connect.
Will upgrade to latest Trellis so I can avoid these issues and use the latest Ansible in the future. And to have a peace of mind. Been doing so much yesterday with ssh-add -l, ssh-add -D, ssh-add -K, ssh-keygen -R, ECDSA and reading on SSH and SSHD that I was going mental…Thanks again!