5 month wake windows

I don't follow her because no Instagram but someone in another group posted this from taking Cara Babies.

My 5 month old only stays awake 90 minutes and then naps for 30. He naps 4 or 5 times a day. Should I be trying to stretch out his wake times closer to 2 hours? How do I do this without him getting overtired? thanks

Edit: He also still wakes up multiple times overnight.