Why this is a build problem, not a marketing one
Content and links assume Google can already crawl, render and index the page. When it cannot, none of that work shows up, and the symptom looks identical to weak content — pages that simply do not rank. The causes are different in kind: a robots rule, a canonical pointing at the wrong URL, JavaScript that renders nothing without it, a redirect chain that drops the signal. Fixing those is development work with a measurable before and after, which is why it is scoped, priced and delivered separately from the rest of SEO.