iPad Pro2021 can not be charged with Android data cable, their interface is different, it must be noted that iPad as Apple's brand, it has its own dedicated data interface.
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You have to use the Apple cable to charge it. Other Android phones can't be charged.
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I hope it works.
Yes, as long as the charging voltage and interface support. The iPadPro charger is compatible with Android. An iPhone or iPad, iPod, etc., can be charged with an Android phone charger. To charge Apple's ordinary digital products, as long as there is a USB interface and a certain power supply can be.
It can be used, but it is not recommended that different chargers, original batteries will be better