Related: I recently learned that in the youtube kids app the parent can sign in and select only pre-approved accounts, and can disable search and recommendations.
yeah you're definitely right. i tried it. it is extremely painful to add any channel to it. its country limited, and afaik you have no free option to add any channel you choose. and it still suggests some stuff, channel bundles, which are boring to children and such.
plus, there is no option for me :) i'm also thinking of myself.