@jhokit Yes, you're right. Actually we cannot add 41, 45 mm complications...

yourSprite.texture = yourNewTexture

I found a workaround for this bug. Make sure not to add any node on your first SpriteKit scene, instead wait 0.5 sec before loading your nodes.

Sure, you can use the update method in your SKScene (make sure to use delta time): https://developer.apple.com/documentation/spritekit/skscene/1519802-update

You can add the other devices from Window -> Devices and Simulators in Xcode

I would also be interested in it for SpriteKit

SceneKit will be replaced by RealityKit on the other platforms, but on watchOS it has no replacement