Hi Leisha, and welcome to cruise-chat. Congratulations on your upcoming sailing!
From the description on NCL's POA cabin page
, it appears there is one bathroom in the AG category.
You may also click here
for a sample photo (the obstruction appears to be the top of a lifeboat).
And, click here
for the cabin's floor plan.
I have not been on POA, so I don't know if all category AG cabins have the same layout.