From CM Jayne:
“Hi everyone, the latest small update was a server-side update to the Navdata from NavBlue. This will happen every 28 days.” Small update - Navdata - Community / News and Announcements - Microsoft Flight Simulator Forums
Last NavData update was released 23 days ago: Small update - Navdata (January) - Community / News and Announcements - Microsoft Flight Simulator Forums
Based on the statement “This will happen every 28 days”, my understanding is that it is correct to say that Microsoft and Asobo will certainly implement every AIRAC update in the sim.