While reassigning a task unable to view the person number

Summary: While reassigning a Journey Task, I am able to search using the Person Number or Name and the same appears as below screenshot. We have enabled the following profiles under Manage Administrator Profile Values. However, the person number does not appear in the List of Values when searched.

ORA_FND_SEARCH_EXT_ENABLED - Site - Y

HRC_ELASTIC_SEARCH_ENABLED - Site - Y

PER_SEARCH_LOGIN_EVENT_PUB - Site - Atom

Has anyone been able to view the Person Number details as part of the List of Values while reassigning a task as similar to Assigning a Journey for the first time.