Addon or Replace strapi existing rich text editor

There is a CKEditor which is implemented well with Strapi Version3 but not able to setup with Version4 of Strapi . Is it possible to implement in version4 or can addon extra components setup with version4 in existing rich text editor ?

Here is the implementation with strapi version 3
[https://strapi.io/blog/how-to-change-the-wysiwyg-in-strapi][1]