I have seen several posts here saying the iPhone 8 Plus is not supported with the Mavic Pro and Phantom 4 Pro.  I have seen other posts from users that indicate that it is supported.  DJI is the iPhone 8 Plus supported or not for use with your consumer line of drones?  Which drones are supported and which ones are not?

Thanks in advance for your help?

No, iPhone 8 plus at the moment is not supported by DJI Go 4, Unless of course your using a high end drone such as an Inspire.
A Basic list of which aren't supported are:
Spark
Mavic Series
Phantoms 4<

My 8 plus woks just fine

It does work, some have to use the usb plug on the bottom of RC to make it work...

Worked for me today.  Unfortunately my iPhone X is not, luckily my wife's 8 plus did with no errors.  Hopefully it continues to be okay as I'll be out of the country tomorrow and will only have the 2 devices!