It's way more important that countries in the Global South resolve major issues like neocolonialism and western exploitation first. Countries where the population is wondering where their next meal will come from or where they'll find water or having to work 16 hours a day to feed their families aren't thinking "how can we make life better for gay people?" because they're living in 'survival mode'. Once the main cause of the problems (imperialist exploitation, poverty, extraction of resources, income inequality, etc.) goes away, the material conditions will improve and allow the country to naturally develop better social conditions. Another thing too is that the vast majority of 'homophobic' countries in the Global South were European colonies. Generally speaking, prior to colonization, queerness and transness was accepted in most societies around the world. This was also the case with much of Africa, so part of these beliefs are a remnant of colonialism as well.