Sitemap Confusion on Google Console – One website accessible by two URL’s

Help please. I am a novice when it comes to websites, the language and technical side. Excuse if this sounds elementary.

If you have one website accessible by two URL’s (seen below), do I need to add a sitemap for each one? When I sign on to Google Console – I see both url’s and click between the two. Both lead to my new Shopify store but only one has the sitemap.

I recently got rid of my WordPress site and moved URL to Shopify through a secured network since it is now e-commerce – hence the https. Shopify Staff helped me set it up and told me where to paste the site map. I don’t know if they knew I had two url in Console or even if it matters. I just want to make sure I am set up in the best way for traffic and indexing.

I became confused when I looked at Google Console Performance for both and noticed the url with no site map is getting more traffic/performance than the one with the site map.

Below are the details…

This url below has the sitemap but I noticed less performance http://www.artbyalexandranicole.com

TOTAL CLICKS 27 TOTAL IMPRESSIONS 466

The url below DOES NOT have a site map but more traffic- I got this secured network when I signed on when Shopify since it is e-commerce.

https://artbyalexandranicole.com

TOTAL CLICKS 257 TOTAL IMPRESSIONS 14.2K

Which ever url you enter will take you to the same secured site. I just want to know if I should move the site map to ?

Or just leave well enough alone and be happy.

Also someone told me there are a few sites you can run your website and check the health of it. Recommendations for that also.

Thank you.

lisa