@Shashi thanks for asking, I believe we are far from reaching 100% electrification and doubt we will be able to reach it in 2030 unless we start taking massive action soon. For developing nations, the initial issue I would agree is infrastructure, first making it available to all their citizens, and then tropicalizing it enough so that such investment is resilient and sound and will support the potential effects of climate change and aggravated natural disasters. Then we also have the issue of financing, in the sense that many of these nations and populations still left unattended will likely be a complicated market to start with as they are not part of the formal economic system of their countries yet, so they have little to no means of paying for such services immediately, thus representing a complicated and tough business opportunity which seems unattractive for most energy companies without any governmental support.
Thus, it seems to be that the core issue with electrification comes from a lack of economic development for underserved communities and peoples who currently do not participate in our connected global economy. Perhaps by enabling local business development in these communities they will themselves seek energy options to reach electrification (even if they start with diesel generators) proving this initial demand potential would give more energy companies and startups incentives to seek to serve this market to then accelerate the pace of it.