Shopify or any other website framework has the same basics and the choice of technology does not make difference.
Duplicate Content: This is a common challenge and content quality and it being plagiarism free impacts your SEO.
Duplicate Meta Tags – Ensure your SEO team has not forgotten to put the meta tag. Websites, plugins, and SEO tools generally have these capabilities to point out the pages
Forced URL Structure – Ensure you follow the basics of creating the right URLs, especially the dynamic ones.
Robots.txt – It’s a small and simple page that helps search engine crawlers in reading your website.
Page Structure and Hierarchy – Make sure the basics of the page like a good and clear h1, content, and appropriate headings are placed.
Limits on Page Titles and Meta Descriptions – Its 60 characters for the title and 160 characters for the description
Poor Initial Template Selection – My advice, avoid any template altogether and build your own.