I get the impression that many of those serving where 'the need is greater' have had to return to their home countries due to the current Covid pandemic.
Just over a year back the society was pushing people to go to places like India; not the easiest places to get to grips with at the best of times. Now I see that the Covid pandemic is pretty much out of control in India.
It seems to me that 'needs greaters' were the Watchtowers way of getting missionaries on the cheap. You have to make your own way there at your expense then cover your own housing and medical costs. I would be pretty surprised if any financial assistance has been offered to those struggling to get home due to the pandemic.