Yes, Vivo V11 does have the FM radio.
No. Vivo V11 has a mono speaker set up.
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.
No. Vivo V11 has dual sim card slots and a dedicated MicroSD card slot. You can use 2 sim cards and a MicroSD card at the same time.