Hi, how are you all doing ? Hope you are doing fine! I would like to integrate Magento to the web that I'm currently using, for example I have uploaded index.html, about.html, and I would like to add something like product.html using the Magento shop feature, is it possible ? I don't want to use a template
If you want to use static html content, you can proceed with headless approach where you can utilize Magento2 shop features via API. There is no an easy and out-of-the-box way to do it, you need some developer's hands-on experience in order to be able to do this.