The file was extracted from stock firmware update TL-WA1201(EU)_V2_240119 [1].
The board file is shared between US and EU variant - confirmed by checking older, common release: TL-WA1201(EU&US)_V2_220103 [2].
File selected by the stock firmware is: /lib/firmware/QCA9888/hw.2/boarddata_0.bin.