Please explain here, How to submit sitemap in Search Console?

Begin by going to Search Console and setting up a new property, or bringing up an existing property you have alredy set up.

Click on Sitemaps in the left, and add a new sitemap URL. My recommendation is to create different sitemap files for each section of your website, and then submit each of the multiple sitemap files individually. This way you can keep track of indexing for each section of your site, and determine if and why there are any sub-sections of your site that are performing inadequately in Google Search. I would also create a sitemap index file that lists out all of the sitemap files you're using, and then add that to the bottom of your website's robots.txt file as so:

Sitemap: https://www.mysite.com/sitemap.xml
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