[Request] Howto SMM unlock BIOS Region of Surface Pro 5?

the attached bios is a dump from my surface pro 5, but when i try flash it says region is smm locked but cant find any reference to the variables when i open it in uefitool,

can someone help me work out how to get rid of smm lock?

surface pro 5 1696 256/8gb

Edit by Fernando: Thread moved into the “BIOS Modding Requests” Sub-Forum and thread title customized/specified