While replying to a user on Twitter, John Mueller of Google said that the location or placement of breadcrumbs does not matter for SEO. Twitter user Joanthan Saldivar had tagged John Mueller with his query. “would lowering the placement of breadcrumbs on a page affect SEO? (eCommerce site)”.
“Great question — no, the placement doesn’t matter for SEO. We use breadcrumbs for crawling (finding internal links) & for rich results (structured data); both don’t depend on placement of the breadcrumbs.” read John’s reply.