The wars in Gaza and Ukraine end. Then what?

Is anyone thinking of what happens after the wars in Gaza and Ukraine end? And I should include Lebanon here too. Because in each case, the amount of destruction has been massive. Gaza has been obliterated, cities and towns and infrastructure in Ukraine have been mashed by bombs anbd missiles, and Beirut has destroyed buildings all over the city. Who is going to pay for the wholesale reconstruction? Who is going to look after the millions of people who have been displaced? Who is going to give these war-suffereing people their lives back? Is there a master plan? If there is, I haven't heard about it. Ending wars is one thing but returning a country devastated by conflict to normality is quite another thing. It will take decades of investment. Is the international community readying itself to provide the funds on a huge scale? Right now, I don't think so which is scary and desperate for Gaza, Ukraine and Lebanon. Syria, too, of course, has been massively damaged by more than a decade of war. Where is all the money going to come from to rebuild all these countries? There are so many questions and no answers.