Page earning impressions is absent from the sitemap

What this means

Google is showing this URL, yet none of the sitemaps discovered during the crawl lists it. Nothing is broken: the page is being found in spite of your submission rather than because of it, so discovery of its updates rests entirely on internal linking, and it stays invisible in the sitemap-scoped coverage views in Search Console. Where the crawl found no sitemap at all, the check stays silent — that is unknown, not absent.

How to fix it

Add the URL to the sitemap covering its section, and confirm that sitemap is declared in robots.txt and submitted in Search Console. Where the omission is deliberate, check the page is excluded from internal navigation too: a page worth linking to is a page worth submitting.

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/sitemaps/overview