After these events (https://inkbunny.net/s/2646199), Jake came to help clean up. he couldn't resist the opportunity for puns.
With Jake not listening to warnings and Simba's cool unraveling, Oliver's doing his best to keep the peace.
Nick came to the TF researcher to see if he could do anything about his situation. Oliver never transformed someone that's been head swapped. It just never came up. Who knows what would happen?