On iOS you can disable cellular data and it won't allow the app to connect to the Internet, and you can work on Wifi Assist to remove cellular data even on wifi

On iOS you can disable cellular data and it won't allow the app to connect to the Internet, and you can work on Wifi Assist to remove cellular data even on wifi https://support.apple.com/guide/iphone/view-or-change-cellular-data-settings-iph3dd5f213/ios#:~:text=Go%20to%20Settings%20%3E%20Cellular%2C%20then%20turn%20Cellular%20Data%20on%20or,Assist%20is%20on%20by%20default https://support.apple.com/guide/iphone/view-or-change-cellul....