It depends.
If you connect your Android phone to the bottom of the remote controller using a USB cable (like this cable), the remote controller will not charge your phone.
Yes, I can use litchi for my Mavic 1 but my mini 4 pro isn’t supported by either version of litchi. DJI haven’t released their SDK for iOS for the Mini 4 Pro so litchi can’t program for it. The drone flies well enough using DJI Fly and modern iOS...