@erikg it looks like you might be trying to do this from the Uptime application. There's a separate Synthetics application you should be trying to navigate to. If you are an admin, and the API key is absent from your stack, the Kibana server will try to automatically restore the key on your behalf when you load the overview page of the Synthetics application.
Your cluster is self-managed, are you able to check your Kibana logs for the time when you load the Synthetics app as an admin user? I am curious to see if there is any error logged when it tries to create the API key.
It's also strange to see that there are so many API keys related to the internal alerts for Synthetics, as there is typically only one. Nvm this last bit there's a key per space.
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