I think the "upgrade successful" app label is a recent(ish) thing - have had some VIP upgrades from almost a year or so ago that didn't have such a message, just a seat change. When I went to the counter for a re-print BP, it had the VIP team message.In hindsight, I probably didn’t. Just went to the boarding pass. Thanks for the tip, I’ll be frantically checking every trip now.
Refresh, refresh, refresh. LOL
Usually only check the app for a gate change or delay that sometimes may not be on the screens in the lounge, not for a VIP upgrade. I've probably had them at most 1 in 10 flights!