There are several views within the Approval feature that you can use to easily find specific Approval request records.
The 'All Approvals' view will display all Approval records for all status's based upon your security setting - you can use the column headers to filter the information as you wish.
The 'Approvals in progress' view will display all Approval request records you are a part of. Approvals that you are not yet required to Approve but will in the further along the request will be displayed.
The 'Approvals requiring my attention' view will display all the Approval request records that are currently awaiting your Approval. The view can also be accessed by clicking the red dot - this will update the current view to this view. The records displayed in this view will update as your Approve/Reject a request
For more information about the generic views or how to create new or edit existing views please refer to these articles here