You can now upgrade the Apache Kafka version of Tiered Storage enabled Amazon MSK clusters. Clusters using version v2.8.2.tiered can now upgrade in-place to the latest Apache Kafka version 3.6.0, which supports production-grade Tiered Storage in Amazon MSK. In-place upgrades use Amazon MSK’s rolling version upgrade capability, which keeps the cluster available at all times during the upgrade.
Source:: Amazon AWS