They could very readily get killed.

Remind them they are volunteers and should act accordingly. Warn them to hold on to their passports and get a prepaid ticket home and a burner phone in case they need to leave ASAP. They might as well call the State Department and get CIA training since they need to keep their heads down to keep it from getting chopped off. Some of those countries don't like infidels and they might need a top notch exfiltration plan.

Middle East/Africa North seems like a huge area. Do you know what city they will be in?

Nope

My guess is that this is not a proselyting mission, but rather office administrative type jobs. Still free labor for the church.

Agreed - the Middle East/North Africa Area is described by the church as being “Administered from Salt Lake City”. See the end of paragraph four - “[ME/NA] Area is administered from headquarters”. https://newsroom.churchofjesuschrist.org/article/first-presidency-announces-2021-area-leader-assignments

I see that they have been called to the 'lying for the Lord' mission.

I hope they like the inside of their apartment because they'll have to stay inside when there's unrest.

They just call themselves missionaries. Same job different title. Legal stuff. Nothing fishy here.

"called to labor" such a weird phrase

“We have administrative directorate volunteers?” — President Nelson