Hi @alvarogv ,
All of my products are marked as canonical as they are affiliate products. So maybe this is the same issue.
But I just found other way around. Yoast free version does not give us any option/settings for creating sitemap. Just a toggle On/Off button. So I turned it off in Yoast and installed another plugin for sitemap. It provides setting for which post/pages/products/categories to be included in sitemap. It solved my problem.
Hope it helps others.
@alvarogv
Hi. I see that you have solved your problem. I am having the same issue. My woocommerce products are not showing in Yoast Sitemap. When I check the sitemap the products are not there. When I inspect such url in Google Search Console, it gives the result “Indexed, not submitted in sitemap”.
How did you solved your issue?