MXF Export not exporting stereo audio channels

Im trying to export MXF op1a from a premeire pro (v23.6.5). I have setup a sequence that has 8 channel stereo, and on the audio track router it shows me the same while i playback as shown below.

But while im trying to export this with the below settings

Now when i export this sequence, the output file gives me 8 channels but shows me as 1 channel audio not 2 channels as expected as in the screenshot below. Im expecting two channels where

Screenshot below of my timeline