Opencart - main image not show in gallery on product page

I am looking for a skilled Opencart developer who can help me with an issue on my product page. The main image is not showing in the gallery.

Skills and Experience Needed:
- Expertise in Opencart, specifically version 3.x
- Experience troubleshooting and resolving issues related to product page galleries
- Familiarity with website design changes and their potential impact on functionality

Project Details:
- The main image is not displaying in the gallery on the product page after recent changes to the website design
- The issue needs to be resolved to ensure that the main image is visible in the gallery
- It is important to identify and address any conflicts between the website design changes and the functionality of the Opencart platform

Please provide examples of relevant past work and explain your approach to troubleshooting and resolving this type of issue.