Yes, the app is Data Center ready, but Atlassian removed the previous "Datacenter ready" Badge on 3 September 2018 and introduced a new program for Data Center approved apps. Find more information here.
All vendors are required to reevaluate their apps and provide a vast amount of testing data to get the status back.
If you would like to speed up the process, to get this app Data Center approved again, vote the ticket below up!