RAM size detection wrong - Xiaomi ac2100 - MT7621

[Borromini]

There are a few threads about it already, maybe they are helpful?

Adding OpenWrt support for Xiaomi Redmi AC2100

If someone can guide how and what information do you need about this router I can help since I have one.

and

New Xiaomi router AC2100

Hi, I saw Xiaomi launched a new router that has a rom that should be based on OpenWrt, anyone familiar with this or have any other info? "It arrives with Miwifi ROM, A highly customized operating system based on OpenWRT"