Products URLs are not indexed on Google

My website migrate from magento to Shopify 2 months ago.

None of my products are indexed by google all of them show this:

Have you submitted your Sitemap to Google Search Console?
It looks like it can’t find one.

If not, you can follow the steps here:
https://help.shopify.com/en/manual/promoting-marketing/seo/find-site-map

Hi
Thank you for your reply. Yes we submitted on google search console - success. The url for home page and url for collections are fine. But the url for products are the problem.
I had some problems with the web developer - the products that were sold were living a blank space at the end of the page. We didn’t want this because customers will think that there were not a second page. They change the urls for urls that had symbols. I didn’t want them as they are not seo friendly. So I paid extra and they modify them. But now they are not recognize by google.

Ask your developer to redirect the URLs to the new ones. If the old pages were indexed, the new ones should be picked up then.

Thank you for your help