When using DC Entry, you can automatically set a parent when creating a new record from a record page layout. For example, automatically set the Account when creating a Contact from a related list. By default, this option is turned off.
Enable setting a parent record from a related list
Navtigate to DC Setup - Settings.
At the "Duplicate Preventin" section, switch the toggle at "Prefill parent record if DC Entry is opened from a record page".