Yes, Nokia 7 Plus in-the-box accessories include a pair of an earphone as well.
Yes, Nokia 7 Plus does have the Bothie feature.
No. Despite a bigger battery and the Aluminium Alloy body, Nokia 7 Plus does not have any abnormal heating issues.
No. Nokia 7 Plus does not have the front camera flash. But the display of the phone works as a flashlight in low-light conditions.
Great battery life, immersive display, solid design, and software at its purest, that's the Nokia 7 Plus for you.