It's quite normal to see only 1-2 options in the 'Template suffix' settings when creating or editing a page in the Shopify admin. Most Shopify themes include just a few page templates by default, but you're welcome to create more! You can create a new page template in the Shopify admin by launching the code editor (Online Store > Themes > Actions > Edit code). Once in the code editor, go to Templates > Add new template, and from here you'll be able to create a new page template by selecting 'page' from the dropdown:
Hopefully this helps!
Thanks for post
yes please flow step
this article show product page but your choose page template