Since they are marsupials, female sugar gliders do have a pouch. They do have a small area in their lower abdomen, which is set up as a means for rearing and raising their young. The pouch is a small sack like structure; it is not always clearly visible. However if you were to look at your female sugar gliders abdomen, you would be able to identify, and possibly even put your finger inside of the pouch. Generally as long as it's not a situation where she is carrying young, the pouch remains empty, and doesn't serve any other significant purpose.
There is normally not any routine care for the pouch, it's not necessary to clean it. It's not necessary in any way to have to explore it and check it. And most of the time their normal grooming habits, they will keep the pouch clean, and there isn't any problem generally associated with their captive care in dealing with the pouch. On rare occasions, someone may notice a foul odor from the pouch, or they may notice that the female is spending a lot of time either over grooming the area, or paying particular attention to the pouch. In those unusual or rare circumstances, it may be best then to check the pouch and make sure you don't identify something wrong with it. And/or it may be necessary to see a veterinarian.
On rare occasions the pouch possibly could become impacted. They could develop a problem with developing of moisture in the pouch if their environmental conditions are off. But for the most part, pouch issues are fairly uncommon and pouch care is not part of routine care of sugar gliders.