YES we are aware of this, this is a Japan install of Firmware.
At this stage MNAO has not released to DEALERS 74.00.200, they may not even have access to it as it is supplied to DISTRIBUTORS like MNAO, MME, MA, MZ, all of them by MMC Japan.
As updating under warranty is a direct cost to Japan they usually only releases the new Firmware to distributors then dealers once maybe twice (if a major problem) a year.
I anticipate that 74.00.200 will be the replacement for 70.00.xxx, but not 100% certain as 74 has wireless Carplay.
And no 74 will not activate Wireless CP in a non wireless CP CMU, incase it is asked.