A sitemap is a list of pages you want indexed, not a list of every URL you have.

If yours includes redirects, 404s, noindexed pages or parameter URLs, search engines learn that the file is unreliable. A quick check: crawl the sitemap URLs and count how many return a 200, are self-canonical and indexable.

What percentage did you get the last time you checked?

#TechnicalSEO