Hi @GSW,
"(no name)" means there is no value set for the Primary Field of your entity. To fix that, you can display this form on the form so user can enter a value or you can automatically set a default or computed value with Power Automate or out-of-the-box workflow. Here's CDS documentation on the Primary Field:
"By default, every entity contains a Primary Field, which is used by lookup fields when establishing relationships with other entities. Typically the primary field stores the name or primary description of the data stored in the entity. You may update the name and display name of the primary field before saving the entity for the first time.
Also, observe that the primary field also has its own Name box, which functions similarly to the entity name described above. The primary field name is autopopulated when a display name is entered, uses the same prefix as the entity, and cannot be changed after the entity is created."
Hope this helps!