There are two display styles accessible for Advanced Links in the request view:
Drop-down select
List with avatars
Administrators have the ability to choose a suitable style within the Advanced Link configuration.
Drop-down select
This style will present the Advanced Link field as a select list with an expandable drop-down menu.
Below is an example of this style on the Customer Portal:
List with avatars
This style prompts users to explore available issues in a search dialogue.
See an interactive example of such field being used in Customer portal.
https://app.arcade.software/share/FxxzMOJU76dkgOvu5pGW