Is there a way/app to block special characters such as -, # in address fields during checkout?

Is there an app or a way to block out special characters for address fields? I looked at Fetchify but not sure this app can do it.

Also is there a way to add to the list so I don’t have to contact my devs to do it? I think support mentioned I need to add it to the checkout.liquid template. If anyone can provide exact instructions, I would be forever grateful.

Any suggestions would be helpful.

Thank you!