Um, no? I was born in late 94 and was the prime audience for blue’s clues. I had so much blue’s clues merch as a tot. It was that and teletubbies. I would say the youngest millenials were probably a bit too young to have caught much of Mr Rogers (I didn’t) but that may be a case by case thing.
That said, I do feel a lil disconnected from the rest of the millenial generation in what I remember from the 90s—as it’s basically nothing—and I often have to teach my '91 spouse and his similarly-aged friends about tech and current slang, but I’m still slightly to old to roll with gen z lol. Being a cusp gen baby is weird.