Storing and Viewing Function Logs
When a function you've deployed to Oracle Functions is invoked, you'll typically want to store the function's logs so that you can review them later. You specify where Oracle Functions stores a function's logs by setting a logging policy for the application containing the function.
You set application logging policies in the Console.
Whenever a function is invoked in this application, its logs are stored according to the logging policy that you specified.
you can view the logs for a function that have been stored in a storage bucket in Oracle Cloud Infrastructure Object Storage
https://docs.cloud.oracle.com/en-us/iaas/Content/Functions/Tasks/functionsexportingfunctionlogfiles.htm