1, yes, as long as the device that supports wireless charging can be used, the difference is the speed of charging is not the same.
2, will not harm the battery.
I own two mobile phones from Apple and Samsung for work. I have been using mophie's wireless charging bank for some time. It can intelligently identify Apple wireless fast charge and Samsung wireless fast charge, and also support wireless charging for other wireless models of mobile phones, which is not only very convenient to use, but also because of its two-way PD fast charge technology, fast charging speed does not harm the phone battery.
As long as it supports the same wireless charging protocol and the same fast charging protocol, it can be fast charging