If Shopify traffic has plateaued for months, outsourcing SEO may help - but...

https://technivorz.com/why-do-shopify-plus-seo-retainers-start-around-7500-a-month/

If Shopify traffic has plateaued for months, outsourcing SEO may help - but only if the work fits your needs. Before hiring, ask for Search Console non-branded traffic or organic revenue results, not promises of quick wins