Resolve Google De-indexing Problem

My entire website has dropped out of Google’s index and most of URLs now shows the “Crawled – currently not indexed” status in Search Console. Before this happened I rolled out significant updates—both content and structural—and I did remember to regenerate and submit a fresh XML sitemap... (Budget: ₹1500 - ₹12500 INR, Jobs: Analytics, Content Strategy, Data Analysis, Page Speed Optimization, SEO, Technical Documentation, Website Analytics, Website Optimization)