The basic iPhone15 supports 15W wireless fast charging.
Only products that integrate Apple's official MagSafe module can offer 15W wireless charging. iPhone
The 15 series will support both Qi2 and MagSafe wireless charging protocols, and Qi2 is recommended as an IPhone-compatible wireless charging technology. All iphones that support wireless charging will be compatible with the Qi2 standard, but Apple has not yet announced the specific speed, but it is certain that it will be faster than the current 7.5W. Not only Apple devices, but also Android phones can use this technology to accelerate the popularity of wireless charging.