Hello @tuhinbiswas98,
From your screenshots, you should notice that Google has already processed the sitemap without any issues. It may take some time for Google to show the number of URLs from your sitemap. Since the pages have already been indexed, you shouldn’t focus so much on the sitemap since the sitemap is just a crawling mechanism and Google may use internal linking to discover the URLs of your website.
For the decline in your search impressions and clicks, here are some reasons why your site might be experiencing that on Google.
1. Seasonal Fluctuations: Certain industries or topics experience natural fluctuations in search volume throughout the year. If your website or content is related to a specific seasonal trend or event, it’s possible that the decline in impressions is due to a decrease in search interest during this period.
2. Algorithm Updates: Google frequently updates its search algorithms, which can impact the visibility of websites in search results. If there have been recent algorithm changes, it’s possible that your website’s ranking has been affected, leading to a decline in impressions.
https://rankmath.com/blog/google-algorithm-update-recovery/
3. Technical Issues: It’s important to ensure that your website is properly indexed by search engines and that there are no technical issues preventing Google from crawling and indexing your pages. Check for any errors or warnings in Google Search Console that could be affecting your site’s visibility.
4. Competitor Activity: Increased competition from other websites or changes in their SEO strategies can impact your impressions. If competitors are optimizing their content better or generating more relevant backlinks, it could lead to a decline in your own impressions.
To identify the specific reason for the decline in impressions, it’s essential to analyze your website’s performance, conduct a thorough review of your SEO strategy, and monitor changes in search trends and competitors.
You can use this guide to run an SEO audit on your site: https://rankmath.com/blog/seo-audit/
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.