Edit range of data source on data entity for exporting different Sales Orders using extension

I need to Export the sales orders along with "item requirement" type SO from D 365. OOB entity SalesOrderHeaderV2Entity have a SalesType range defined on it to be only SO.

I have tried to use event handler method, "SalesOrderHeaderV2Entity_onInitializedEntityDataSource" but this method is not getting called.

How can I edit it in extension to export it?

Thanks,

Vinit Goyal