CheckNetworkStatus() doesn't work for me (using PWA on iPhone 6s). I also tried adding the NetworkStatusChanged Block to the bottombar accompanied by a handler. And also I tried calling the GetNetworkStatus with the subsequent GetNetworkStatus.IsOnline. All without any result: the NetworkStatus is always true, no matter what. Therefore, testing the offline branch was not possible for me on my iPhone using PWA.

My final workaround:

In the action (eg. SaveOnClick), create a new flow starting with the communication handler: communication exception

Copy the offline-branch and paste this offline-flow under the communication exception. I also added an "offline" message for more convenient testing.

See attachment as an example of the final result.