Yes, any page that gets organic traffic has accumulated authority you can redistribute through internal links.
Product pages that rank and get clicks are real authority sources, often stronger than blog posts because commercial-intent traffic carries more weight.
Identify which product pages get the most organic traffic (Search Console, last 28 days, sort by clicks).
From those high-traffic product pages, add contextual in-body links to category pages or other products you want to boost.
Use descriptive anchor text matching the target page’s keyword, not “click here”.
Keep total in-body outbound links to ~3 per source page as more dilutes the authority each recipient receives.
Don’t link to pages already ranking 1-3, that’s wasted authority.
Prioritize linking to “striking distance” pages (positions 11-30 for their target keyword) since they convert to rankings fastest with a small authority boost.
But be careful not to link from your money pages to pages that compete for similar queries. That can create cannibalization rather than help. Cross-link to genuinely complementary pages, example: a popular product to a category page that lists it, or a related product, not a near-substitute product.