Yes, Vivo V11 does have the fast charging support.
Yes, Vivo V11 has a 3.5mm headphone jack.
Vivo V11 does have the display screen flash, which is like Apple iPhones. It does not have the particular LED flashlight for the front camera.
Vivo V11 has a dual rear camera set up. The primary 16MP rear camera has an aperture of f/2.0 while the secondary 5MP rear camera has an aperture of f/2.4.