Yes, Wasabi Cloud Sync Manager can be used to migrate data from AWS Glacier to Wasabi. The data needs to be retrieved from AWS archival tier to S3 Standard before WCSM can migrate it to Wasabi.
Once the data is retrieved to S3 Standard, WCSM can initiate a migration job to copy it to Wasabi.
Note - In these scenarios, the customer will be charged retrieval fees from AWS for the data egressing out of Glacier to S3 Standard. Wasabi's migration charge does NOT cover/include these charges.