Expected… these are old “leaked” tools and it will happen more often on recent bioses.
MMtool 5.00.0007 opens it but as its old version it can identify the modules, AMIBCP 5.02.0034 also opens it but again it has the well know “String” limitation.
Alternative to AMIBCP:
[TOOL] UEFI Editor - BIOS/UEFI Modding / BIOS Modding Guides and Problems - Win-Raid Forum (level1techs.com)