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OPA627: resistor noise bandwidth

Part Number: OPA627


in the related post, Art Kay gives the method of calculating R1 noise and Rf noise independently.

But I find that it doesn't count for BWn.

I wonder how to calculate BWn for R1 noise and Rf noise.

For example, I think Rf noise should be able to be shown directly at the output since it's directly connected to the output, then how to calculate BWn for Rf noise?

Is it still GBW/(noise gain)? But for Rf noise whose frequency is higher than GBW/(noise gain) should still be directly passed to the output, isn't it?