It can be used for any cube or event. The WCA ones are built-in but you can even add custom event types if you want.

To add to that, is there a good tutorial for 4x4 and 5x5?

Might be good to point to tutorials you have tried and why you didn’t find them to be good. Otherwise it turns into - let me google that for you - here https://jperm.net/4x4

Jperm is generally pretty good but didn't explain all the algorithms, when I learned a 4x4x4 a couple months ago I used that plus this http://www.rubiksplace.com/cubes/4x4/

Basic gist is solve the middle 2/3 edges to look as if they were a 3x3 edge, then solve like a 3x3, accounting for parity issues. Beginner method at least