Given that snap is using aws-cli and eksctl, +1 from me for auto-connect of these personal-files plugs pending publisher vetting. Similarly to this comment from the topic linked, the snap should also clarify in the description that it is a canonical snap and point out the description of the config (like you did with aws-cli docs.
Similarly, +1 for auto-connecting ssh-public-keys as this makes sense for the purpose of the snap. Again, it should be explained how ekstest is configured in regards to ssh connections, similar to here. What do other @reviewers think?