In the "Changes" tab in the MCP, you can see a table of outstanding change requests. In this table, you can click on the various headings at the top to sort the change requests to your liking, and you can even click on the "Change Types" drop-down to choose which kind(s) of change requests show up in this chart.
Also, a quick reminder that only change requests for "Accepted" reservations will show up in this table. If you're looking for a change request that was sent to a "New" reservation, that reservation will have already been updated! Change requests submitted to new reservations are processed automatically, unless it's passed the cut-off date.