How can I optimize images with lazyload in a custom gem theme?

[DesignedByMalik]

Hey guys!

I am working on optimizing a shopify store from a client, I wanted to do that with lazyload for the images since that is the best way right now. However,

his store was built with the gem theme customizer and I cant find some of the images within the code to optimize. How can I optimize the images with lazyload now?

Have you guys ever had an issue like that?

I would love to hear your answers on this.

Best regards

[oreoorbitz]

Can you link to the page for gem theme customizer? 

[DesignedByMalik]

Yes, the link of the website is https://goldeneskleeblatt.de/

[Iliasshad]

I recommend you to check my blog post about Shopify speed optimization and I write about how you can lazy loading technique to your theme code https://iliashaddad.medium.com/shopify-speed-optimization-step-by-step-guide-4afca6423b18