Arduino pro micro is Recognized as 'USB serial Device', and not as a HID device

[YotamAmrani]

Hey there!
I am quite new here - hope that I'll manage to explain the issue I'm encountering.
I am trying to simulate a keyboard, using 'Arduino pro micro' and 4 push buttons.
Using the 'bootKeyboard' from the keyboard library, I managed to press a button and simulate a key press accordingly.
the problem is that the key press behaves differently from my native keyboard (it seems like there is no regulation over the press),
I thought it might be a driver's issue - currently, in my device manager I can see that the Arduino is recognized as a 'USB serial device'.
shouldn't be recognized as an HID device? would it affect the keypress behavior?
thanks!