From pic I can't tell if it's a prolapse. Also, you stated frog pooped, so that make's me think it's not. A prolapse normally goes back in by itself, unless a problem like an intestinal infection develops or causes it. Because your tank is newly set-up; think observation is good step now rather than adding any medications while tank is cycling. I read your other thread and saw a pic of tank so imagine it's a new set-up. Just to double check, you used de-chorinated water, right?

Your new tank will cycle itself in around 30 days. You can cut that time in half by using a product that adds essential bacterias like Seachem's Stability. Also, if you have an established disease free tank can move some media into new tank filter but there is always a risk with that. During the stabilization period the Ammonia will peak and then go down and then Nitrites will peak. Then both ammonia and Nitrite will reach zero and your tank is cycled.

Your frog will be exposed to those bad chemicals; so observe it daily and note any changes in eating, swimming or pooping behavior. Here is link to article discussing several ACF diseases to give you idea what to look for: African Clawed Frog Disease and Injury. Do not over react, these frogs are pretty tough.

During this time you can do normal weekly water changes and clean the filter media in tank water. Recommend not using ammonia removing media or liquids because they will sequester too much Ammonia from tank and will start a yo-yo effect that will make the process much longer. Good luck !