1 - Do we request an update on the ticket after escalated? If so?
how long do we wait to request an update to L2?
48 hrs will be appropriate for requesting updates.
2 - After the issue is resolved, will we received the proper notification from L2 indicating the resolution of the case so we can contact the customer who reported the issue?
This is what usually happens. L2 team asks us to either close or gather additional info for the case.
3 - Who will be closing the Ticket after resolved? L1 or L2.