To add a sitemap to Google Search Console, select the site on the home page, go to the crawl tab, and click the Sitemaps button to access the Add/Test Sitemap page where you can type in "sitemap.xml" and click Submit to register the sitemap.

2. 1. Select site on your search console home page
2. Go to crawl tab

3. 3. Click Sitemaps button

4. 4. Go to Add/Test Sitemap
5. Type sitemap.xml & Click on Submit button