Yes, Vivo V11 does support the Google lens.
Vivo V11 25MP front camera has the aperture of f/2.0.
Yes, Vivo V11 does have the FM radio.
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.