My daughter started kindergarten this year and they are teaching reading. She’s 5, but she’s among the youngest in her grade, with the older kids having turned 6 already. Keep in mind this is all very simple books in the “See Spot Run” category of difficulty for the most part.

She actually had already started learning some reading at 4 when she was in preschool. It was mostly just sounding out letters but at that point kids can start to sound out simple words too. Preschool is elective though so plenty of kids won’t start that young.