Yes, Vivo V11 does have the dual rear camera setup. The primary rear camera is 16MP and secondary rear camera is of 5MP.
Vivo V11 25MP front camera has the aperture of f/2.0.
Yes, Vivo V11 does support the Google lens.
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.