Bafang Go+ v3.1.0 works with a C245 display for me. I can set and read settings for each PAS level.
The app requires (imho) far too many permissions, and requires you to log into a server, presumably in China. So I can't run it on an old non-internet-connected phone while riding. The Bluetooth communication and display should not require any of this stuff. I will not be using it except to change parameters occasionally.
I'm endeavouring to decode the Bluetooth protocol it uses between display and app, in order to do some of Go+ functions without needing the login, and to get back some of the functions the old Go had (e.g. motor power and amps)