As usual , you made a great nice job tranthidung ☺️
All my respect Sir .

I would like to suggest adding another element to your list which is about "Local Boards" if you can collect data about them. Personally, i don't know what non-English board has been created first or when/how hire mods.
As an example , and as far as i can remember, my local board "arabic" has been created in 2017, and i think this info should be displayed in your list if you can provide further details. Same thing with other boards.
It would also be good if you can find data about first to latest created boards and sub_boards. This should also belong to the forum great changes.