Production data in non prod
I am not going to lecture anybody about having PI or sensitive data from production on any of your non prod servers.
Over the years I have seen many methods for getting data from prod to non prod.
I have seen transactional replication setup pulling data from production publisher
I have seen log shipping setup. A sneakier method was to go and copy transaction logs from the destination server and re-applying them.
Copying of database backups from the database server using Robocopy jobs.
Or using Robocopy jobs to pull the backups from the SAN.
An SSIS package to export/import tables.
I am sure that there are lots of other ways that people try to get data refreshes - just keep your eye out.