Yes, the reports can be backfilled starting from January 2018. Please note that some v5 fields may not be available for past periods (e.g. lowestPrice on the search level).
We are introducing daily content suppression updates and a Partner Portal dashboard for full details across most Flight content.
If any content was suppressed in the last day, you will receive a daily message with a link.
For a limited time, both the new and current channels will be used, duplicate messages can be matched by ticket number.