Data Domain migration with cloud-tier hardware refresh question

Hey everyone,

I have a customer who purchased new DD9900's at both their Prod and DR sites as a hardware refresh. While I've done many of these before, this is the first of which have cloud-tiered enabled systems involved. I know that Collection Replications are not supported with cloud-tier enabled systems and that wouldn't help get the cloud tier migrated over anyone. I can't find any documentation on what the best approach is in this scenario. How can I go about getting everything moved over to the new DD9900, including the cloud-tier? I saw an old post where someone asked this same question back in 2017 but there wasn't really an answer then either. Any help would be appreciated here.