Product social share image automatically shows third image. How can I change it to the first image?

Topic summary

Issue: When sharing a product URL from www.redoak.in on WhatsApp, the link preview shows the third product image instead of the first.

Goal: Change the social share/preview image to the first product image.

Context: The selection of the preview image appears automatic when sharing links; the user wants control over which product image is displayed.

Status: No solution or steps provided yet; guidance requested and the discussion remains open.

Summarized with AI on January 1. AI used: gpt-5.

My store is www.redoak.in. When I share a product link URL on Whatsapp, it shows the social share image of the product along with the URL, which is great. But for some reason it picks the third image out of all the product images. I want it to show the first image. How can I fix this issue?