Create new session without connecting (disconnected)

[EdenEast]

I am trying to accomplish the equivalent of the following tmux command

tmux new-session -d -s session_name -c "session/starting/dir"

The -d will create the session but will not attach to it.

Looking though the options list there is an option called attach-to-session which states:

        --attach-to-session <ATTACH_TO_SESSION>
            Whether to attach to a session specified in "session-name" if it exists [possible
            values: true, false]

When trying to use this option it still attaches to the newly created session.

zellij --session session_name options --default-cwd ~/path --attach-to-session false

I saw that it was referring to session_name in the options so I attempted to use that instead and that does not work either.

zellij  options --session-name session_name --default-cwd ~/path --attach-to-session false

Is there a way to create a session without connecting to it?