Switch Pro was allegedly real but was ultimately scrapped.

Holding out hope for its release is discouraged by a story from Digital Foundtry, which asserts that although the supposed system did exist at one time, many unknown developers verified with them that it had been scrapped. The Switch family of consoles will continue to be the base unit, the smaller Switch Lite that does away with dock functionality, and the more expensive Switch OLED whose main selling point is having an OLED screen along with other less significant upgrades. This is in line with what Nintendo hinted at regarding new Switch models.