Approver method issue

Good afternoon I have 3 questions , I ma able to process a request approval for batch journal template .

But the approver dont receive anything .

I checked the method those code unit ,1535 1521 1509 and run the debugger
I dont find any method who receive request to approve , is there any method that exist that receive the request ?
I dont find any method that mention did not find the approver or user group approval , is there any method that exist that confirm the approve received that request ?
We have to user approver but can we also use a workflow user group for finance General Journal Batch template ?

Regard Rodd !