Can I make a QR code of my whatsapp number?
Yes, you can!
In order to make a scannable QR code of your whatsapp number, use the following link:
https://wa.me/[phone number without + or leading zero]
And put that link into a QR code maker of you choice.
Of course, after creating the code, it is best to test whether it works. If it doesn't work, check if you formatted the phone number correctly.