Also, my first comment refers to the guidance in military=bunker wiki.
It says "Use this tag only for features that are fully operational or remain in active military use."
And absence of this one from official map, suggests to me that it's not in military use.
https://experience.arcgis.com/experience/961bc813592f46dc81841634fa03ba7f/&locale=lv#widget_1=active_datasource_id:dataSource_3,center:509446.53155553015%2C312909.1190508351%2C3059,scale:6284.051994215437,level:-1,rotation:0.10122781198651865,viewpoint:%7B%22rotation%22%3A0.10122781198651865%2C%22scale%22%3A6284.051994215437%2C%22targetGeometry%22%3A%7B%22spatialReference%22%3A%7B%22wkid%22%3A3059%7D%2C%22x%22%3A509446.53155553015%2C%22y%22%3A312909.1190508351%7D%7D

Re shaheds and heads, I guess in a pinch any building=bunker will do, but I don't think it's a reason to retag all of them into military=bunker.