From Few weeks I have observed that I have issues with Google indexing with some of the specific URLs on my site, Google experts say adding no indexing URLs into new XML Sitemap files won’t help them get indexed.
For Your Information, we have a one Sitemap.xml with a 100 of URLs but only 30 URLs of those URLs are being indexed by Google search engine and taking the other 70 URLs and adding them to an additional Sitemap file won’t get Google to index them.
On Twitter, John Mueller Confirmed that it “wouldn’t change anything” to take this approach. In the place of additional sitemap, we should work on the quality content of those pages awesome and then that would be a reason why Google would index them.
That wouldn’t change anything. If we’re not indexing 80 URLs from a normal 100 URL site, that sounds like you need to work on the site instead of on sitemap submissions. Make it awesome! Make every page important!
— John ☆.o(≧▽≦)o.☆ (@JohnMu) February 26, 2018