Use Google Search Console's URL Inspection tool, review the Pages indexing report, and search Google for specific URLs when needed. A sitemap can help discovery, but being in a sitemap does not guarantee indexing.
What this means in practice
Treat this as one part of a broader search-visibility system. The best next step is to verify the current site and profile data, compare it with the actual search intent, and make changes that improve clarity for customers as well as search and AI systems.
Allen Ink generally prioritizes fixes that affect the largest number of pages or customer touchpoints first, then builds supporting content, local authority, reviews, and measurement around those foundations.