The iPad charges an iPhone and then that iPhone charges AirPods or an Apple Watch.
Apple is working on anew wireless charging technology that can charge multiple devicesat the same time.
In 2017, the company announced a new project, AirPower, but it did not hit the market.

The Cupertino-giant Apple discontinued the AirPower charger as it didnt go well.
The gear was a matt Qi charger that was capable of charging three Apple devices.
Last year, Apple released a new wireless charging technology, MagSafe with iPhone 12 series.

Already there is MagSafe Duo, but its different.
Imagine an iPad charging an iPhone and then that iPhone charging AirPods or an Apple Watch.
Earlier in June, there were reports that Apple is developing a multi-rig inductive charging mat.

Now, again, its in the news so that we might get the new charger by Apple.
Reports are saying Apple might bring the reverse charging technology to its next iPhones.
It allows the users to charge AirPods or Apple Watch by their iPhone.

However, for this, Apple needs a larger battery on iPhone to let it charge other devices.
Currently, only Pro Max models have large batteries.