Yes, Nokia 7 Plus does have the Bothie feature.
Yes, Nokia 7 Plus in-the-box accessories include a pair of an earphone as well.
Yes, Nokia 7 Plus is made of series 6000 Aluminium.
No. Nokia 7 Plus does not have the Optical Image Stabilization but it does have Electronic Image Stabilization.
Great battery life, immersive display, solid design, and software at its purest, that's the Nokia 7 Plus for you.