This is frequently asked question about the cascader component. Adding a FAQ section would help more users who have the same problem.

https://stackoverflow.com/questions/60320913/ng-zorro-cascader-lazy-load-data-nzloaddata-function-got-this-undefined/60928983#60928983

Right now, uses eva icons.
However, we also have fontawesome installed as a package, but need to use everytime. Now, to use font-awesome with nb-icon, some basic changes need to be made. You can easily find it on Google search.

We want it because though eva-icons are amazing, they're very limited.