Apple Watch began before he became CEO, it wasn't under his direction. He just continued the existing initiative.
Wikipedia's citation that the Watch began in 2011 after Steve's death is incorrect. It began in 2010 under Steve's direction after the acquisition of Bob Messerschmidt's Rare Light, which brought hearth rate monitoring tech to Apple. Messerschmidt was assigned a team by Steve. Don't blindly trust Wikipedia, folks...
As for the others I just meant platform products, none of those have their own OS until homeOS later this year. None of them defined new product categories for Apple - for instance the AirPods were an iteration on EarPods, not a new product category. Apple was already shipping a home speaker product before HomePod, which was an iterative product without its own software platform for developers. M-series is iterative tech, not a new product category. The Motorola ROKR wasn't an Apple product. But sure HomePod is perhaps Tim Apple's one original new product category before Vision if the 2006 Apple Hi-Fi counts as a distinct product category.
And I would argue the M-series CPU are pretty major as well.