No. Redmi Y2 can support only one sim card on 4G network at a time. Another sim card will be either on 2G or 3G network.
Yes, Redmi Y2 does have the fingerprint scanner & face unlock, too.
Yes, Redmi Y2 does support the PUBG game.
Yes, Redmi Y2 does have the OTG support.
Yes, Redmi Y2 does have the dual app support.
The Xiaomi Redmi Y2 is a slightly better attempt at a selfie-focused smartphone than the model it replaces. It has proven hardware that is capable of delivering a smooth user experience, plus MIUI 9.5 which has a lot of added features.