Hello,
We checked your sitemap again, but were not able to find any issues there:

In this case, please try to remove all the submitted sitemaps from your Google Search Console and resubmit /?sitemap=1
and see if that works for you.
For more details, you can check this URL: https://rankmath.com/kb/couldnt-fetch-error-google-search-console/#rename-the-sitemap
Let us know how it goes. Looking forward to helping you.
Thank you.
I have tried this method and the console reflects Success. However, if I click into it, nothing has been processed for 6 days now. Does it mean it’s not working?
https://imgur.com/a/D1pyKaz
Hello,
Sorry for the delay.
In your screenshot, Google has accepted your sitemap hence the “Success” status. Meaning your sitemap is working fine when Google last crawled it.
The zero discovered URL means that Google didn’t use the sitemap to find your content URLs.
It mostly happens when you have good internal linking or use the Instant Indexing plugin.
In this case, you either have to wait for the search engines to completely crawl the sitemaps or let it be since sitemaps are just a backup crawling mechanism for search engines. Usually, the URLs are discovered via other means such as internal links or backlinks.
Here’s a link for more information:
https://rankmath.com/kb/zero-discovered-urls-through-sitemap/
Hope that helps.