One nap transition

Hi ladies, I was just wondering if anyone's little is on 1 nap a day already?? if yes how did the process go??

As my boy is one day on his 2 naps schedule where his awake window is about 3.5 hours between naps and another day he suddently can stay awake so much longer about 5-6 hours between sleep.He started to fights a naps pretty badly and waking up early suddently in the morning. 😒so i was just wondering if it could be nap transition or maybe sleep regression.