For the love of god please someone figure out how to add this as a feature to Roku vs having to go through the app services. I figured it out for Amazon Prime - because I only have one subscription I was able to delete the "kids" one and now I don't get prompted. But I do share a Netflix so I can't get rid of it there. And I can not find any help or direction on how to fix it for youtube anywhere.
For more information about that channel's features and functionality, you'll want to contact the channel provider support directly to inquire further. Many channels on Roku are developed and maintained by the channel provider themselves.
As previously mentioned in @RokuMary-F's post above, channels on Roku are developed and maintained by the channel developer themselves. We suggest reaching out to YouTube's customer support team to see if they have any additional settings or options within their app that may resolve the issue you're experiencing.