I recently upgraded to 6.2.2.8 and then 6.2.2.9 and started getting AAC 2 channel audio with StreamFab for Peacock. I downgraded to 6.2.2.7 and am getting EAC3 5.1 channel audio again.I tried this on a few series / movies. One specific series is The Hunting Party season 1.
Thanks,
Jeff
I did try Episode 1 of The Hunting Party and got EAC3. There is no option for Peacock in SF to choose EAC3 or AAC.
Might be a location issue? I am in the USA, I have Peacock through Xfinity, Peacock with Ads.
This was using 6229. I can't say why it does not do it for you in 6229, but does in 6227.
Streamfab has again got to the point where we need access to several versions back to 6220, depending on what you're looking for.
Good luck.

ADDED: In streamfab general settings, I always have EAC3 selected. I don't know if that helps or not.