For access to $HOME/.ssh there is already the ssh-public-keys interface - this would be a better option in this case if you only need access to the public keys since depending on the use-case this may be able to be auto-connected to the snap. In case you need access to both the public and private keys, there is the ssh-keys interface which provides access to both - but this is more privileged and would likely not be able to be granted auto-connection. Can you please clarify what parts of $HOME/.ssh dbeaver-ce needs access to and for what purposes?