The back-end functionality is still web functionality. Just because a user doesn’t see all the server stuff doesn’t mean it’s not necessary to support a website. There are billions of websites across the world, and they almost all use some combination of back-end, front-end, database, and server code.
You kinda forget that for each front end you see theres at least 4 times more backend to support it.
Also there are ton of non fron facing software.
Anyway its not really a competition. No one will be offended if you are wrong or not.
The back-end functionality is still web functionality. Just because a user doesn’t see all the server stuff doesn’t mean it’s not necessary to support a website. There are billions of websites across the world, and they almost all use some combination of back-end, front-end, database, and server code.