Some SEOs are noticing that when you look at your sitemaps report in Bing Webmaster Tools, for some sitemaps, some are missing the Index Coverage button. I personally can see the same thing for some of the properties I have access to within Bing Webmaster Tools.
I spotted this a few days ago via Gaston Riera and Peter Nikolow on X who shared these screenshots of the sitemaps interface missing the index coverage button for some of the sitemaps that were submitted:
My guess is that there is not enough data for the index coverage report to show anything useful for these specific sitemap files? But I can be wrong.
Microsoft has not replied about this yet but I am curious what might be going on here.
Forum discussion at X.