Hi,
You can try checking if Mouse Keys is turned on, as this can sometimes affect the number pad on the right side of your keyboard.
For Windows 11:
Go to Settings > Accessibility > Mouse, then make sure Mouse Keys is turned off.
For Windows 10:
Go to Settings > Ease of Access > Mouse, and ensure Mouse Keys is turned off.
If it is already turned off, try turning it on first, then off again, and restart your computer to refresh the settings.
I’ll be here for your update and ready to help until this is resolved. If you find the answer helpful, please feel free to rate the thread. Otherwise, leave a comment below if there's anything else I can help you with.