How to use DDCDS_CUSTOMER_DOMAIN_VALUE_T?

Hi,
In a RAP education video i have seen an example and i am trying to do the same steps to be able to learn RAP.

In the video a CDS view entity was created and it gets the fix values inside a domain from DDIC.

I did the same but when i try "Open with -> Data Preview", i get nothing.

These are the values inside the domain.

I have seen a comment about the solution which recommends to add an entry in the table ABAP_LANGU_SWCMP. But i have no idea how to do it and which entry to create.

If you share any idea i would appreciate.

Best Regards