I recently found out about another Ever After High knockoff. This time it's not from Disney - it's an Italian animated series called Regal Academy, and it comes from the people who made Winx Club.
From what I read, the characters are the grandchildren rather than the children of fairy tale characters, and the main character is Cinderella's granddaughter. Most of the other characters are based on stories that EAH used. Notably, they have a character based on the Ugly Duckling, which EAH does not have as of yet, as well as an ogre's granddaughter. But other than that, it's glaringly similar to EAH.
Here is the Wikipedia page of the series: https://en.wikipedia.org/wiki/Regal_Academy
Here's the first episode: