Just to build on what @abrown_splunk mentioned. Right now looks like the issue is that SAI doesn't support Splunk_aws_TA 4.6. It looks like with Splunk_AWS_TA, metrics still do come in, however they have an extra dimension to them. For example, CPUUtiliziation is a metric with 4.5, however that metric changes to CPUUtilization.average with 4.6.
I would hold off on upgrading to 4.6 if you rely on the dashboards from SAI.
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