Finally we had chance to find a chromebook and test. Thanks to Hong Kong’s peaceful days.
Surprisingly we can connect to MT300N-V2 without problem.
We asked a friend to test in the US. She cannot connect to MT300N-V2 with firmware v3.012. But after she upgrade to v3.025 she can connect without problem.
Google Chromebook 78.0.3904.92
Intel 7256 （Rev b9）