I checked some articles / documents, only Snapshot COPIES will be copied over to cDOT, but as far as I know, they did not mention anything about if Snapshot policies/schedules will be also migrated over?
If yes to both of these, we can check the status of applying the snapshot policy from the 7MTT logs. That is done on the 7MTT Home page or if you would like to use the CLI:
C:\Program Files\NetApp\7-Mode Transition Tool20ga\7-Mode Transition Tool\bin>transition bundle-tool-logs
INFO: Successfully bundled tool logs on the server at the following location : C:\Program Files\NetApp\7-Mode Transition
Tool20ga\7-Mode Transition Tool\asup\7MTT2.0.0-20150615143725560.zip
Grab the logs and post them to a NetApp support case to have them take a look.