Yes. Tecno Camon i Air 2+ does have the front camera LED flash.
Yes, you can play PUBG game on Tecno Camom i Air 2 Plus.
Yes, Tecno Camon i Air 2+ does have the fingerprint scanner.
Tecno Camon i Air front camera has a f/2.0 aperture. The phone has a dual rear camera. The primary 13MP rear camera has a f/1.8 aperture while the secondary 2MP camera has a f/2.4 aperture.
Tecno Camon i Air 2 Plus has 5V / 1.2 A charging support. Which is slightly faster than the normal charging.