Change keyboard on external keyboard
I'm using latest version of SwiftKey and Android on Samsung Galaxy S10.
If I use SwiftKey using external physical keyboard such as Logitech K850,
I know that Ctrl + Shift changes the language between English and another language such as Spanish.
If I want to switch to another keyboard app such as Samsung keyboard or Google GBoard using only physical keyboard, what should I do?
(I know touching the 'dots' on the lower-right corner does that, but I wonder if I can do this using only physical keyboard)