More images field on my product page

Hello, could you help me with this please :
I’ve added the More images field in the Product panel, I’ve added some images in it, but I can’t see them in my product page. How can I do ?
Is there a link between this problem and the fact that there’s a padlock on the source of the collection list settings ? What is this closed padlock .
Thanks for your answer (sorry for my english)
Capture d’écran 2020-11-06 à 17.29.53