Try to import via <ckeditor [editor]="Editor"
[config]="editorConfig"> but still don't know how to make it work.
Please suggest any ideas, thank you so much.
Hi! You should start by creating a custom build which will have mentions plugin included. Here is the guide which explains how to do it.
After that, you should integrate this build with your Angular application. Please, see our Angular integration guide (note that you should import your custom build instead of our ckeditor5-build-classic).
Thanks @Mgsy