I have very limited knowledge but the explanation I got was the military is not secular enough and the average soldier is influenced by either old Catholic homophobia or newer Salafist homophobia, and the latter is used as a recruitment technique to pull soldiers to the Salafist militias who are the biggest threat to the current governments. The theory apparently is that making ‘deviant’ sexual behaviour illegal on paper means the propaganda cudgel is taken away from the militias but thje government never has to enforce it meaningfully when they decide to be allies- that last part seemed like cope on the person I was talking to’s part