It is a frontend for standard CLI tools yes, but it comes with many additional features. The focus is especially on integrating standard CLI tools with your desktop environment and other applications that you use like editors or terminals.
For example, of course you can just use the ssh CLI to connect to your server and edit files. But with XPipe you can do the same thing but more comfortably. You can source passwords from your local password manager CLI, automatically launch terminals with the SSH session, edit remote files with your locally installed text editor, and more.
Of course you can do this also with tools like putty, but the difference here is the integration. Other tools ship their own SSH client with its own capabilities, features, and limitations. They also have their own terminal. XPipe preserves full compatibility with your local SSH client and terminal. E.g. all your configuration options are properly applied, your configs are automatically sourced, any advanced authentication features like gpg keys, smartcards, etc. work out of the box.
The same approach is also used for the integrations for docker, podman, LXD, and more, so you can use it for a large variety of use cases.