Q: iPhone and itunes

Try the steps here to see if they help.

If iTunes doesn't recognize your iPhone, iPad, or iPod - Apple Support

kelbrooks wrote:

 

my iPhone 6s icon does not show in iTunes however, my iPad does.

 

The problem is when it is not connected to the computer by usb but either plugged into an outlet or not.

Hi

Check that you have enabled syncing with iTunes using Wi-Fi for your iPhone 6s.

Follow the instructions here, including, if necessary, under "Get help":

Sync your iPhone, iPad, or iPod touch with iTunes using Wi-Fi - Apple Support