The demand splits into three layers and most stores build only the third. The first is species: what lion's mane is, what reishi is traditionally used for, how cordyceps militaris differs from sinensis, what chaga actually is. The second is manufacturing: fruiting body against mycelium on grain, hot water against dual extraction, why one method is used for beta-glucans and another for triterpenes, and what a certificate of analysis for a mushroom extract actually shows. The third is the product page. Without the first two the third has nothing to rank on.
This is a category where education genuinely earns links, because the questions are technical, the community is engaged, and good explanations are scarce. A page that walks through a real certificate of analysis, names the laboratory and explains what each line means will be cited by people arguing about the subject elsewhere. That is the fastest authority available to a new brand here, and it costs nothing but candour.
One technical caution is specific to this niche. Functional mushroom products are not psychoactive, and copy that borrows vocabulary from an entirely different category attracts the wrong classification from ad reviewers, payment providers and occasionally from search engines. Keep the catalog and the language unambiguous, keep the species and the part used in the title and the structured data, and keep formats that belong in different product categories on clearly different templates.