Hi everyone, I’m asking this question again because the original links and resources for the question are outdated and I’m stuck on step 4
I’m using Boundless Template. On product page, I only see first image and have to scroll down to see another images.
this is where the original answer is as stated stuck on step 4
https://community.shopify.com/c/Technical-Q-A/How-to-show-Product-Image-Gallery-on-Product-Page-Boun… where @Lixon_Louis
Sorry you are facing this issue, it would be my pleasure to help you.
Welcome to the Shopify community! 
Thanks for your good question.
Please share your site URL,
I will check out the issue and provide you a solution here.
thanks for url it can be done with some customization code but If you’re comfortable working with coding languages (eg. HTML, JavaScript, CSS, and Liquid), then you can try to follow the custom coding provided by Product Image Gallery for Boundless theme or It can be done by doing some code customization. Please take the help of a developer and hire Shopify Expert or me