for clarity

gaza is already a torn up area that needs to be rebuilt. but gaza needs outside help to rebuild. but they dont want isreal or jordon or cairo or lebonon to run in, as that feels more like a new invasion..
instead trump is offering a separate option. for the US to manage the rebuild and also manage the rules of housing the homeless during the redevelopment ensuring that the surrounding countries dont over step any invitations to work(rebuild) in gaza, nor letting resettlement countries setting rules of 'no return' on the people they invite in to live in neighbouring countries

also it was the bombs that already destroyed peoples homes that already displaced those in gaza.. they dont have homes anymore..
trump is offering them a managed/mediated offer to put them somewhere they can live whilst the rebuild happens
homes in neighbouring countries that are a little reluctant to take them in unless they can benefit from taking over gaza

what trump/gaza deal does not want is where gaza becomes jordan/isreal 2.0 whereby jordon/isreal temporarily house gaza population but then not let them go back home in gaza. the deal is to set the rules of play that after the rebuild the gaza population can return to gaza.. by not letting jordon/isreal set the rules of their own conditional resettlement as a method of takeover of gaza