Redmi 7 Snapdragon 632

[Pimenov]

Is the Redmi 7 (2/16)'s stock firmware compatible with Dolphin (is it 32 or 64 bits)?
The SoC is SD632 and it can run light and medium games well with some setting tweaks.

Here someone played games on that phone:
https://youtu.be/JiziLt8eqSE
Could that be any custom 64-bit rom like Project Treble for 2016 mid-range Samsungs?