Judging by your screenshot, I see the issue with the viewport, in the theme it can be changed in Theme Settings -> Other -> Viewport tag: https://take.ms/Ag1Vg
1. You can copy this header-elements/wishlist.php file with the same path to the child theme and then in the copied file add the arial-label to that tag.
2. As for that JS library, it is an important library in the theme so we cannot delete it.