Hello Jamie,
Unfortunately, there is no option to extend the time offered during ACW while on the interaction pane. When choosing the
Mandatory, Time-boxed ACW option, Admins will define a timeout up to a maximum of 900 seconds. Agents are able to exit earlier than the timeout specified but cannot "override" to exit later.
Perhaps you can consider the option
Mandatory, Discretionary instead. This removes the timeout, so agents are given the freedom to do ACW for as long as they need.
------------------------------
Nico Feliciano
Genesys - Employees
------------------------------