Updating our theme for the first time in over a year and curious if any checklists/best practices around on-page SEO exist for this. I've seen threads saying that it won't affect Google Search Console but curious what else might come into play from an SEO standpoint. NOTE - we're not switching to a new theme but just updating to the most current version.
@JPE If helpful then please Like and Accept Solution.
Ok, you can make duplicate copy of store and update the theme , then check shopify speed score and Pagespeed score to find out that if updating speed may or maynot effect Google SEO as website speed Desktop/Mobile is now a days crucial for ranking in google search Engine. I don't see any other factor that can effect SEO if you update your theme.
Hope this Helps, If it does then please Like and Accept Solution.