On iPads with iPadOS 13 or newer, you can open several windows of Termius and use two windows side-by-side, i.e. in split view.
Open multiple windows
To open a new window, touch and hold the app icon in the dock or on the home screen, then tap Show all windows and +. The other window will be moved to the background.
Alternatively, drag Termius from the dock to the left- or right-hand side of the screen. This will open a new window and put it next to the already visible window. Unless you have some windows that are not in split view in the background.
Terminals are window-dependent
Active terminals are window-dependent, which means when you create a connection in one window, it will be available only in this window.