From another thread:
Yes, the LNM diagram shows what is set in the nav data, which will be correct (at least if using Navigraph). Unfortunately that is over-ridden when actually flying the approach by a 4-byte value in the airport BGL file that forces the localizer to ignore the heading value in the nav data and assume the exact runway heading. This was a deliberate design choice by Asobo, which needs to be corrected.