Availability of r7iz instance type in eu-central-1a ?

As of the latest available information, Amazon EC2 R7iz instances are currently available in the Europe (Frankfurt) region, which corresponds to the eu-central-1 region. However, the specific availability within individual Availability Zones (AZs) such as eu-central-1a is not explicitly mentioned in the provided sources.

R7iz instances, which are powered by 4th generation Intel Xeon Scalable processors (Sapphire Rapids), have been made available in the Frankfurt region, but the exact AZ-level availability is not specified. These instances offer high performance for workloads requiring a combination of high compute power and high memory.

It's important to note that AWS typically rolls out new instance types across all AZs in a region over time, but the specific timeline for availability in eu-central-1a is not provided. If you're experiencing limitations in availability for eu-central-1a specifically, it might be worth contacting AWS support for the most up-to-date information and potential timelines.

In the meantime, you are correct that transferring an existing EC2 instance between AZs is not possible. If you need to use R7iz instances and they are not yet available in eu-central-1a, you may need to consider using the available AZs (eu-central-1b and eu-central-1c) for your workloads that require these instance types.
Sources
Amazon EC2 R7iz instances are now available in additional AWS Regions
Amazon EC2 R7iz instances are now available in additional AWS Regions