The full list of SaaS integrations: https://aws.amazon.com/appflow/integrations/ Amplitude, DataDog, Dynatrace, Google Analytics, Infor Nexus, Marketo, Salesforce, ServiceNow, Singular, Slack, Snowflake, Trend Micro, Veeva, Zendesk. I feel like a notably missing product from this list is Jira. As horrible as it is, lots of companies use Jira for tasking so it should have been supported out the gate.
This is a far cry from the 347 available in Power Automate. Still interesting to see.
Basically you can build a “connector” to any REST/JSON API