You can’t “bring it to front” but you can change the zPosition of it.
The higher the zPosition of the node the later it gets rendered.
So if you have three nodes with zPositions of -1, 0 and 1 then the -1 will appear at the back. Then the 0. Then 1 will appear at the front.
If they all use the default zPosition of 0.0 then they are rendered in the order they appear in the children array of the parent node.
You can read it all in the docs.
https://developer.apple.com/documentation/spritekit/sknode