I am interested as well. As far as I know, it is near impossible to get DOS to expedite the case, unless it's a life or death situation or government interest. During the pandemic, some people were able to expedite based on the fact they work in healthcare and are thus needed for US effort against the virus, however, since then DOS stopped expediting on this basis. I did see some other people who were successful in getting their cases expedited by DOS post about it, but what is very frustrating is that these people never share the reason why they got the expedite approved and are generally very secretive about it.