Since 2015, i have seen only Nigerian board being created recently. I am not aware if any other board is created since that time.
Few more local boards have been created since 2015 (excluding Nigerian ofc), you might wanna check
History of local boards.
Lots of discussions and active participation can be one of the reasons for the creation of a local board, don't think a lot of merits should be the criteria or it can be if we are looking for quality.
Where exactly I mentioned merits in my post as one of the criteria for a local board?