14" machines, due to their size, they do not have full keyboards. They do not have num pad section therefore no point to have num lock key. Pleas try an USB numeric keypad for laptop for example
https://www.amazon.com/Best-Sellers-Computers-Accessories-Numeric-Keypads/zgbs/pc/2998471011
Some have num lock key, some number keys are always on.
Regards.