According to the documentation, it does have caps lock functionality, but it must not be via a dedicated key. It has a Left Shift, Enter, Delete, Tab albeit on the bottom row, Fn, and the letters. In the bottom left corner is a Clicks-specific modifier which offers access to symbols and numbers, in the same positions they'd be on the onscreen keyboard. Finally, there is a key for Siri or dictation, and one for toggling the visibility of the onscreen keyboard.