This happens if the firmware doesn't include the specific driver for your Wi-Fi chip (e.g., RTL8189 or6225). You may need to try a different ROM version.
The latest firmware updates for the MXQ Pro 4K 5G Android 11 TV box are based on Android 11 and bring several improvements and new features. Some of the key changes include: firmware para tv box mxq pro 4k 5g android 111 updated