Here is how to enable or disable Ask Age Range for Kids Mode in Microsoft Edge. It is disabled by default, so Edge doesn't show the range selection dialog every time you start the Kids Mode browsing session.
When the user launches Kids Mode for the first time, Edge asks to choose the age range. This is required to configure Edge settings so that your child can access relevant and safe content. Although Microsoft Edge does not create a dedicated child profile, it remembers which age range you have selected and no longer asks you to specify it the next time you launch Kids Mode. Such behavior may not work well for families with children of different age groups.