After saving the secret in FEPClusterCR, reload Fluent Bit container to apply the changes.
Apply the changes in one of the following ways:
Create a FEPAction with type fluentbit_reload as shown below:

Use the below command and execute in fluent-bit container if you wish to reload the Fluent Bit's configuration manually:
curl -s -X POST -d '{}' localhost:2020/api/v2/reload