Yes, Redmi Y2 does have a dedicated MicroSD card slot. You can use 2 sim cards and a memory card at the same time.
No. Redmi Y2 is not a waterproof mobile phone.
Yes, Redmi Y2 does have the bokeh mode.
No. None of the Xiaomi phones comes with the earphone. You have to purchase it separately.
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.