Tigray war may cost $2.5b according to estimates
TPLF has conquered most of the north and south of Tigray.
Ethiopia is one of Africa's largest aid recipients. The US alone contributed a billion in 2020, and therefore has some leverage. Investing in Ethiopia right now comes with significant reputational risks, making companies more reluctant to submit massive investment bids.
Ethiopia is finishing their dam and stressing tensions with Egypt and Sudan. The dam fits in with Abiy's plan to lift Ethiopians into a higher economic class. Sudan might benefit from a huge energy production facility on it's border for it's own energy needs.
Getting ahead of things, but if Egypt was to take up a campaign against Ethiopia, due to the huge distance, it would have to use Sudan.