Hadn’t heard any responses so asked my (IRL) 7M8 pilot friend.
His response;
Hey dude. Happy new year to you too!
Sure thing, actually we switch to HPA from inches and leave it if the country or airport uses it. Typically it’s more accurate on inches but any approach expects you to use the local setting they provide and leave it. Plus if an accident happens the lawyers will say you didn’t use the local meter and pilot error kinda thing. Everything comes down to liability and the most obvious.