Hello! Apologies for the delayed response; I just noticed your message.
To solve the ‘problem’, I followed this video guide, but unfortunately, the link is no longer available. Perhaps the issue is because the tutorial was created for the 11th version of the theme, while the current version is 12 (but it still works perfectly for my Dawn 12.0.0 theme): https://www.youtube.com/watch?v=Za8QYFJ9njc
But! The video author has added the necessary codes to this page: https://jabwebsolution.com/how-to-create-product-slider-in-shopify-dawn-theme/. I also found a new video on the same topic on the author’s channel: https://www.youtube.com/watch?v=ouhYdxGSfhc&t=548s. Please check it out; here, the author might also explain where to add the codes for them to work.
However, I noticed that the arrows in the new video look slightly different… So, if the “updated” guides don’t assist you, please feel free to reach out again, and I’ll try to provide you with the codes I used for my own site earlier 
Hope this will be helpful for you!