OpenWRT support check on Mi Router 4A Gigabit Edition (R4A) IN unit

[SPEED-OX]

Because of Multiple version of Mi Router 4A Gigabit it's very difficult to confirm and install OpenWRT on a specific unit, So I'm seeking some help for safe installation.

Here are the hardware info's I found

• Model: R4A without shielding
• SKU: DVB4272IN
• Manufacturing: 07/2021
• System version: MiWiFi Release 3.10.181
• SN: 31225/A1NN21543
• Cpu: MT7621AT
• Flash Chip: winbend 25Q126JVSQ
• wlan: MEDIATEK MT7612EN MEDIATEK MT7603EN

The exact hardware image also on the OpenWRT blog

• And if anything goes wrong which stock firmware image to use for this specific unit ?