Problem with "core" in "Set Destination"

What did i miss, thanks in advance for your assistance.
i don’t see “core” in any “Set Destination” in Inbound Call Control of FrePBX i do see it in Module Administration .
how can i get it or could you please give an idea …and why it doesn’t appear in any Set Destination .

If that is the case you will not find it as it is more like the base system that you need to make things work.

You can find some information on each of the modules by going to documentation, module documentation.