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Now you need to understand that your phone will suffer battery damage if you help your friend because your Pixel's battery controls reverse wireless charging. That is, unless you can plug in your Pixel. This way, your phone's battery can charge while you help your friend charge their device's battery. If you think about it, plugging in your Pixel while using it as a wireless charger is no different than plugging in and using a regular wireless charger or charging station.
Battery Share doesn't work on the Pixel 9 series when you're charging the phone. | Image credit: Forbes
Although Google did not say why it decided to make this change, Pixels 9 series, it may have been done to extend the life of the battery that powers each Pixels 9 phone in the series. Charging the cell while wirelessly charging another device cannot have a positive effect on battery life. By the way, the foldable Pixel phones do not support Battery Share at all.
And here's an interesting trivia question. Do you know which phone was the first to offer wireless reverse charging? It was the Huawei Mate 20 Pro, launched in 2018.