Hi, I'm Estrella. I'll do my best to help you.
Please check if Mouse Keys is turned on. If it is, turn it off.
Go to Windows Settings > Select 'Ease of Access'.
In the left menu, find and click 'Mouse'. Make sure 'Mouse Keys' is turned off.
If it's turned off, turn it on, then off again, and restart your computer then check.
If the issue persists, is this a laptop or a desktop? If you're using an external keyboard, what is the exact make and model?
Also, what is the make and model of your device?
In the search bar, type MSINFO32 and press Enter.
Please share a screenshot of that window.