Is export default in backend not allowed / bugged?

I have two files in my backend test.jsw and test2.jsw… I have a function in test2.jsw which is exported like so

function returnSomething() {
	return 10;
}

const defaultExp = {
	returnSomething: returnSomething
}

export { test2 as default}

This code works and I can import the and do defaultExp.returnSomething() but the permissions on the exporting backend file are not accessible when I use the default export

What do I make of this? Should I not use export default?