So ... I have been able to get it to work after 18.2.1 on 7th Gen iPad [partially!]. Following some of the previous recommendations, here are the steps:
- Turn off Apple News in iCloud
- Remove the app and choose to delete the data
- Restart the iPad
- Re-download the app ...... but before you open it again .... turn off your wifi
- Open the News app. It will tell you it is not connected to the internet
- Turn on your wifi again ... the app should start syncing and load up
- DO NOT turn iCloud News again, this recreates the spinning problem
This gives you a working install of News+, but without the syncing across devices. You can re-select magazine again and enter subscriptions etc. I've been through this cycle a couple of times (I made the mistake of turning News on again in iCloud the first time) and it looks to be repeatable. Not ideal, but if it works for you, at least you have got some of your functionality back. Good luck!