HCM user entities to pull published schedule details for group of employees

We are working on an integration where we need to extract published schedule details for a group of employees within a time period (past 3 months). We also need to track the changes made since prior run, so we need to create a changes only extract. We have tried cloning the "Published Schedule Extract" and created a changes only version, but it is only extracting the data for one employee in one run, using the person number we have provided in the parameters (using HWM_EXT_PUBLISHED_SCHEDULE_ALL_UE). We have tried to run it for a group of employees but it is not