Wow, it seems you guys got the Chinese version of the TA-1062 where the seller flashed the global ROM on it. I don't think your device will be certified from the playstore as it has been modified. I also have the TA 1062 but mine is the Taiwan version (android one). Currently on the June security patch.
You guys should wait for the Android P update and try to flash the WW Android rom. Nokia 6 2017 China varint had the same problem when converting to Ww rom but with orio update the TA-1000 culd be changed to TA-1003 and after that OTA updates also got available. Search convert TA-1000 to TA-1003 in xda developers for that. Hope 7 PLUS also upgradable like that but I can't promise you guys that.