Request to Change Employee Name Display Format in System

One of our customers would like to change the format in which employee names are displayed in the system. Currently, the names appear as Last Name, followed by a comma and a space, and then the First Name (e.g., Sanalkumar, Krishnaprasad).

This format is consistently used across all modules where person names are selected, such as Requestor in Requisition, Requestor in Payable Invoices, etc.

The business would like to modify this format by removing the space after the comma, so that the name appears as Sanalkumar,Krishnaprasad instead.

Could you please confirm if there is a way to update the display format for existing person names in the system?