Both of the pools at Animal Kingdom Resort have zero entry pools. One of the pools is at Jambo House (the Lodge) and the other is at Kidani Village.
The pool wheelchairs at all the WDW zero entry pools are similar to the one in the video already posted. In my family’s experience, the pool wheelchairs are not unusually just sitting out - you need to ask for them. If they just leave them out, kids take them and play with them.
The pools also have pool lifts that guests can operate themselves - all pools and whirlpools at WDW have these pool lifts.