programming in college different than real world?

School and college basically give you enough background to be able to continue learning on your own.

You will be learning for the rest of your life, if you are enthusiastic!

With things such as you mention, there is both the language itself and the libraries or APIs used in a framework such as Unreal engine.

It's a bit like knowing English, then studying a technical subject like physics or medicine; you are still using English, but the contexts and terminology change with the subject.

It's the same type of thing when using libraries and tools created by other people, you have to learn the terminology they created to be able to use those tools.

All the functions used are purely what the particular programmer(s) decided fitted their requirements.

Maybe your problem is that you think the "real world" is about writing mobile app games.

Have you looked at job ads for entry-level programmers?  Which ones would you apply for if you started now?

Employers who hire entry-level employees know that school is limited.  You will have experienced coworkers who will mentor you.

But, you still have to sell yourself.  If you have no confidence then that will be difficult.

Instead of a mobile app, try to write a business report that gets data from a database.  Do you know SQL?  Do you know how to submit SQL through C++?

college is a con - you are going to need to teach yourself because the muppets who work in colleges know jack