You won’t believe it but it’s in Beta now.
Right click on a host to open in another window.
Make sure you have the credentials saved in host otherwise it won’t work now – the feature is not completed yet.
FYI, not as great as it would be to have movable tabs, but you can Ctrl+Shift+n and open a new termius session that actually works and doesn't just spin. Can't tell you why.
When I try to open the Termius client for a second time, it hangs at a gray window with a spinning circle. Multiple sessions would be useful especially for windows virtual desktops (where different desktops are doing different things).
Its bash my friend. Learn pipes and how to grep and your world will change forever.