In both PlaySolo and Studio Client, all of the keys on your KeyPad (also known as num pad) do register detection through UserInputService however In-game they do not.
I also noticed a strange bug while typing in-game with the number pad, pressing Number 5 will clear the message you were just typing.
Bump.
It’s worth noting if you plan on using this online:
Some desktop keyboards (like mine) do not have a keypad.
I also suppose laptops usually don’t either, unless they’re massive.
Regardless of having a keypad or not, it should work online if it works in PlaySolo.
It’s helpful for user-defined keybinds, or variant keybinds to make normally-accessible things more easily accessible (e.g. instead of Shift+1 you can optionally press NumPad 1) – I know you weren’t implying otherwise, but it still can be pretty useful.