iPhone & Apple Watch not charging with same charger

Hmmm — when both an iPhone and Apple Watch suddenly stop charging from the same adapter, it strongly suggests either a charger fault that damaged the devices or, less commonly, a coincidence where both devices had their own charging issues around the same time. Since you mentioned you were using an original Apple USB-C power adapter, it’s unlikely to be a counterfeit issue, but even genuine adapters can fail. A faulty adapter could deliver unstable voltage or current, which can damage the charging circuits inside the devices. Once that happens, the iPhone and Apple Watch may no longer respond even when connected to other chargers.

AFAIK, as for what Apple typically does in cases like this: if both devices are under warranty or covered by AppleCare+, they’ll usually be replaced rather than repaired — iPhones are almost always swapped for a replacement unit. Most of the time these are “service replacement” units, which may be new or Apple-certified refurbished, but from the outside, they look and perform like brand-new devices with a fresh battery and shell.

For Apple Watch, the replacement process is similar. If Apple determines the adapter itself was defective, they may replace that as well. I’d be curious to hear what Apple tells you, because if it was truly a power adapter failure, they’ll likely want to investigate further to prevent a repeat issue.

I already provided you what I believe Apple typically does in this situation. You can certainly contact Apple and let them know you preferences.