Pair Cellar Watch to Non-Cellular iPhone?

My daughter has a active cellular watch and my old iPhone X that is not active on a cell plan. Can I pair the watch to the iPhone and not activate the iPhone? Is it possible to have the end result as Watch still works and uses Cellular and iPhone is paired, but does not have access to cellular network? I don't want to have the iPhone on the cellular network, but use the iPhone to get more features and customization on the Watch. (Family setup does not allow any customization or new apps) I'm afraid that if I pair it then I will have to have the iPhone on a cellular plan. Thank you!