iPhone has stopped updating apps automatically
As I was in the middle of relocating, I had updated my country amongst other personal information in my Apple ID. It appears installed apps stop updating until you reinstall them from the App Store for the new country even if the app is available under the very same name. You will be informed App Store switches country upon opening App Store for the first time after updating country in your Apple ID.

I have rung Apple about this issue, and they did not have much of a solution other than reinstalling the apps.
You could switch back to your old address to have automatic updates resume, but keep in mind your new ‘foreign’ payment details (ie credit cards) will not be accepted. At the time, I was told there is no way around this. I hope Apple changes this policy in the future as it is the only service which does not accept my foreign issued Mastercard to this day.