Paste a sitemap or a list of URLs to find problems with it, then open a one-click Google check for each page and record what you see. The browser cannot ask Google for indexing status itself — that needs an API key and Google blocks cross-site requests from a page like this one (CORS). Every check opens a real Google search in a new tab; you read it and set the status.
Nested sitemaps listed in this sitemap index (open each, then paste its contents above):
No URLs yet. Analyze a sitemap or URL list above.
Paste one page's full HTML source (browser "View page source", then copy all). Checked entirely in this browser; nothing is uploaded.