Add a friend feature and other

So, 7 years ago a post was made by Matt, ( I’ll leave y’all to find that ), and to put it in simple terms it was talking about adding friends and/or siblings as friends on Kahn Academy. So, me and my sister wanted to add each other as friends on Kahn Academy, but couldn’t figure out how to do it. So, she looked into it, and our best assumption is that the feature hasn’t been added yet. Keep in mind, the comments posted on this post were made 6 years ago and the post itself was 7 years ago ( it’s currently June of 2024 ) . So, when is the feature going to be added???? Also, whenever I go to edit my account I’ll make the change I want to, but when I press save it asks me to sign in, and when I do now everything I just did is gone and I have to do it all over. This is also annoying because when I go to edit it a few minutes later, the exact same thing happens even though I should already be signed in. Can somebody please explain that/this to me??????