Charging is certainly can be charged, iPad charging IC will be based on different charging devices, intelligent adjustment of charging power, if there is no original charger to use Android charger is not inappropriate. And most of the charging devices that are not compatible with Apple devices are generally faulty charging cables, and it is quite rare that the charging head is not compatible.
No, the Apple charger is dedicated and different from the others
As long as the same charging protocol is supported, it is generally possible, and most of them are compatible now.