The 3 larger savannas typically have both giraffes and zebras.
The middle savanna, Arusha, can be viewed from the outlook behind the lobby which is called Arusha rock. Half the rooms on Zebra and Kudu trails overlook this savanna. There are usually several giraffes and at least a pair of zebras.
Uzima savanna is on the right/pool side of the lobby. Last Dec. the giraffes on Uzima included the 2 new baby giraffes. They usually have a pair of zebras too - but not always IME. Some rooms on Zebra trail overlook Uzima savanna and there is an overlook out beyond Jambo’s pool. I'm not sure about access to that Uzima overlook for the duration of the pool closure.
Sunset savanna is the largest savanna and is to the left of the Jambo lobby and lies between Jambo and Kidani. Sunset can best be seen from the overlook behind Kidani's lobby (an easy 10 minute walk from Jambo or a quick shuttle ride.) Half the rooms on Kudu trail and some rooms on Giraffe trail front the Sunset savanna. Sunset has giraffes and also has a herd of zebras which are part of a breeding program which AK/AKL is part of.
See p. 1 post 6 of this thread for a map that helps to orient you.
https://www.disboards.com/threads/jambo-the-newest-akl-information-thread.3567178/