Automate the Boring Stuff Chapter 7: Regular Expressions - phone number and email extractor only extracting phone numbers

I made sure the code was copied correctly - nope. You should replace {2-4} with {2,4} to look for 2 to 4 characters according to both RegEx syntax and chapter 7 text.

You may consider to use https://regex101.com/ to try your regular expressions online and see regex full explanation.