The reason I gave you the new URL is because the non www is redirecting. Leave it as I provided and wait.
Also understand that Google does not need a sitemap to start a crawl process. External links from already crawled pages will kickstart the process just fine.
After almost 2 weeks, I still have an issue with my sitemap not being indexed. This is very frustrating as I publish a lot of new SEO articles and my website is not updated properly in Google.
Google has indexed pages on your site irregardless of whether they are showing an error in the search console. Your XML sitemap is formatted correctly and available to crawlers.
Google has to deal with millions of sites and yours has zero backlinks so they don’t have a reason to do more. As an SEO practitioner for over 20 years I would strongly advise you to start building some quality backlinks and activity on social media so Google and other search engines have a reason to actually show results to searchers.