Multiple Posts(like) page in admin

If I’m understanding the question correctly I think you need to create a custom post type for your products:

https://codex.www.ads-software.com/Post_Types

This code generator is very handy if you’re new to creating custom post types:

https://themergency.com/generators/wordpress-custom-post-types/

And I’d make it a plugin instead of adding the code to your theme functions.php file. Here’s some info on how to do that:

https://codex.www.ads-software.com/Writing_a_Plugin#Standard_Plugin_Information

Thaaaaaaaaaaaaaaaaaaaanks.
It’s like a miracle. ??
This is exactly what I wanted. I had couple of projects that I needed this very much.
The website that you mentioned that generates the code was very useful and great. I expected a long code in the end but it was a tiny one.
Anyway, you rescued me from death. Thank you.
I think now I can add my custom fields to this post type and go on.
Thank you thank you thank you