Apple’s Fast Charge Capability and Qualcomm Quick Charge 1.0, 2.0 or 3.0 Industry Standards??

Does anyone know the correlation between Apple’s USB-C power adapters and the Qualcomm Quick Charge 1.0, 2.0 or 3.0 industry standards?

There seems to be a lot of confusion re “Fast Charge” feature of newer iPhones (up to 50% in 30 minutes). The iPhones 8 and after have this capability. However, since all 2017 and 2018 iPhones have been sold with the trusty old 5 watt, 1 amp, A1389 USB Power Adapter, the capability is not experienced. To benefit from the fast-charge capability one of the wireless charging pads or an Apple or third party USB-C Power Adapter is needed along with a USB-C-to-lightning cable.

Though nothing about the rapid charging is mentioned in the iOS 12.1 User Manual (iBook), this Apple Support page explains it, https://support.apple.com/en-us/HT208137

Third party USB-C power adapters that can charge rapidly list whether they meet Qualcomm’s standards for Quick Charge 1.0, 2.0 or 3.0. https://www.qualcomm.com/products/quick-charge-3

Apple does not mention the Qualcomm technical standard for its USB-C power adapters, but simple says fast charge requires USB Power Delivery (USB-PD). The following are Apple’s fast charge power adapters:

29W USB-C Model A1540,

30W USB-C Model A1882,

61W USB-C Model A1718,

87W USB-C Model A1719

If considering a third Party USB-C power adapter, insure it mentions that it works with capable Apple devices in the details or in customer reviews.