I dont care what the Bunga haters say I think he would be a great dad. He's probably not the one doing the more "serious" stuff, but I think he would be the fun dad.
I feel like it would be really interesting if he takes up adoption like his dads, and I think it'd be extra cute/cool if he ends up adopting animals that were the lion guard's enemies. Maybe he adopts a cobra, snow leopard, binturong, komodo dragon, african/asiatic leopard, vulture, monitor lizard, crocodile, porcupine, scorpion, or jackal. I mean I'm more inclined to a cobra and binturong because those directly affect him and Binga, but any of the others would be really fun.
I think I remember someone talking about him adopting/taking care of an indian/egyptian cobra directly related to Ushari somehow and I really think that'd be interesting to explore with his character. Let him grapple with the fact he killed someone (I should add that Ushari did not die so someone could be fed, and Bunga was just doing self defense, but still), that because of his own actions, this cobra lost a family member. Now, maybe he wants to step up and help that cobra and possibly their family. I just think it'd be really cool to see him and Kion interact with Ushari's family members, Roar Towards The Future and Perfectly Valued does that well.
Really any animal that is an "enemy" would be very cute to see. I honestly just do see Bunga maturing over time, and becoming the fun dad. He knows how to babysit, and maybe he uses that knowledge for being a father, or maybe he just takes up a "job" of babysitting a lot of animal's kids sometimes. (If I may add in a little bit of my headcanon/universe here, he, Binga, and Nirmala all start up a tiny adoption/nursery program at the tree of life. Binga and Bunga work a lot with setting up the program, and Nirmala is there since she's the healer, but other animals end up taking over some of Bunga and Nirmala's jobs. Binga stays, she's the main "guard" of the program after training a little with Beshte and Baliyo for basic combat, and she's also still like the host and all. I follow the bear Binga headcanon as well, so she is also just like a beast at combat anyway, she doesn't fight much, but she will fight if needed.)