is Google Identity Platform region based?
Google Identity Platform is global. Google describes this service as planet scale
.
is there a way for Google Identity Platform to support multiple
regions in case of an outage?
Although Identity is global, the service is replicated to each region. Occasionally there is a region outage. For example in 2020 there was an outage. Google publishes details on service imparement. Example incident here. Service outage list here.
For example: Amazon's Cognito is region based and
migrating/replicating user credentials from one region to another is
not supported by Amazon. It is a manual process to replicate some of
the data between regions.
Google manages the service. There is nothing for you to do in the event of a region outage except for waiting for Google to bring the service back online. This does not effect other regions and typically the service continues to work globally except in the impaired region.
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