Why? Because solar power is way cheaper. Cheaper to install initially but also way cheaper to operate over the long run --- no fuel costs.

Fossil fuels are a competitive disadvantage for AI and manufacturing.

Speaking from a developing nation. Upfront solar costs aren't cheap. Reasons why people invest in solar include unreliable grids which result in power cuts from lack of maintenance or capacity. For new buildings bureaucratic processes are so cumbersome and often there is lots of corruption for you to get connected to the grid so people rather just invest in solar and have nothing to do with often hostile local government officials looking for a bribe to get you connected to the grid. It can take years to get connected to the grid.

I would argue it is also because the energy prices in those markets are higher compared to, for example, Europe and the energy consumption is lower.