Is there any possible way I could return my iPhone 11 charger because it’s not functioning

Use the Contact Support link in the upper right, and discuss your options with the folks that work for Apple.

If you end up purchasing a charger yourself, some details on fast charging:

Fast charge your iPhone and iPad - Apple Support

Most accessories have a limited 1 year warranty. You'll probably need the receipt and cannot be physical damage.

Depending on where you are the stores might be closed, so it might be best to contact Apple directly since this is a user-to-user we cannot process the request.

Apple Support: https://support.apple.com/en-us/HT201232