Wake time for baby

November_mama • Engaged to my best friend💍Mommy to an Angel baby👶🏼💗loving life as a first time mom to a beautiful baby girl🌸

So my little girl just turned 5 months on monday. We’ve started sleep training and it’s including naps. We’re instructed to give her a wake window of 2.5 hours but she’s definitely overtired by then. She seems to still have a 2 hour wake time window even though she’s 5 months now. Anyone else notice shorter wake times than what is “normal”?