Answer
While it's possible to open/write/close files from SmartBASIC Interactive Mode (AT+FOW, FWR, FCL) to e.g., enter configuration information for a SmartBASIC application, there is no AT command available to display the content of a file from the flash file system.
A workaround would be adding another SmartBASIC application to a device which can be started in Interactive Mode (AT+RUN or just the name) and opens the (config) file and prints the content to the console. Below is an example application.
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