But product gallery works with that solution https://gyazo.com/b6d09ecb5a71296dbdeafd97f78969dd It works the same way like with the default theme that you enabled before. Why is not it suitable for you?
If you want to make it work with the custom gallery I suppose you need to contact plugin author and ask them to make improvements. I see that they added special options for other themes https://prnt.sc/103nl1z
