Most internal links are nofollow
What this means
More than half of the page's internal links (of at least three) carry rel="nofollow", which stops link equity flowing to the rest of the site.
How to fix it
Remove rel="nofollow" from internal links that should pass equity; reserve it for links you genuinely do not endorse.
Fix effort
This check needs review: the change can be drafted for you, but a person has to approve the wording or choose the target before it ships.
Authoritative source
https://developers.google.com/search/docs/crawling-indexing/links-crawlable
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