The following public information regarding time zone changes also cannot be changed as it states, "If a date/time attribute is created with the attribute set to DateOnly or TimeZoneIndependent, the behavior of the attribute cannot be changed."

When FO and CE are connected via DualWrite, time zone discrepancies occur, so please add a setting function to unify them.

Title : Behavior and format of the date and time attribute

URL : https://learn.microsoft.com/en-us/dynamics365/customerengagement/on-premises/developer/behavior-format-date-time-attribute?view=op-9-1#convert-behavior-of-existing-date-and-time-values-in-the-database