SEO strategy

Diagnose in this order

Skipping to content when the problem is technical wastes months. Work down; stop when you find the break.

1. Can it be crawled? Robots directives, noindex left on after a launch, blocked resources, crawl budget wasted on parameter and filter URLs.
2. Can it be indexed? Check what is actually in the index versus what should be. Canonicals pointing at the wrong page and unintended duplicates are the two usual causes.
3. Does the page deserve to rank? Search intent match first. A page can be technically perfect and still lose because it answers a different question than the query asks.
4. Does the site have the authority to rank for it? Some terms are out of reach for now. Targeting them is a decision to spend without return.

Architecture

Structure follows how people look for things, not how the company is organized.