BMW Still advertises the OTA map updates so it's reasonable to expect them (it was certainly a consideration for me when I bought the car). See their webpage here:
https://www.bmw.co.uk/help/technolog...o-media-system
"Please note: Over the air map updates are included – free of charge – for three years from time of production for all BMW vehicles fitted with the NBT Evo generation of the BMW Professional Media System."