Slime Rancher 2 has been announced during the Xbox Bethesda E3 2021 showcase, and it has been confirmed that the game will be an Xbox console launch exclusive. However, there is going to be a bit time to wait as Slime Rancher 2 will not be out until 2022. That is a large release window, and there is nothing more specific for the game at this time. You can watch the reveal trailer below.
The first Slime Rancher released in 2017 and released on Xbox One, PS4, and PC.
Source: XBox Showcase