

The person you replied to is referencing findings made by the author, in the article.
The author tried plugging a PD charger into the watch to charge it, and it wouldn’t work. It’s probably not PD as a specification couldn’t work, but that the watch failed to negotiate with the charger.
Whatever the reason, the findings were that plugging your PD laptop charger into this cheap little watch does not result in any charging.
You can certainly charge a phone with a PD laptop charger. PD does negotiate, so it will only give the device what the device indicates it can support.
I use my laptop charger with my android phone frequently if I’m out and about.