Hello,
1) Does not work https://gyazo.com/ba0d4bd7d23949c70f1367c8f7f9ddd4
2) Because of the code in your child theme functions.php https://gyazo.com/4a3029280fdff8eeee688320c14bb437
Keep only default WC action to show it https://gyazo.com/917461f92ac27350a065e907202ca2a3
Regards