Egypt will never allow it. They want their cashcow to be in status quo forever so they can milk them dry. They're not even allowing research into other, currently unknown chambers (which were found to be there, just never opened)
They banned destrucive research for new rooms, because some researcher decade ago, enthusiastically drilled a bunch of holes to nowhere in order to do find them.
They still allowed the non destructive muon imaging a few year ago that heavily hinted to an unfound room.
it could be kind of disrespectful towards the culture that built them. I dont think we can restore them in such a way it respects the beliefs and culture of those who built them, so best thing to do would be to make sure they dont decay further.
Also, restoring them just so tourists can have something to gawk at would be a kin to showing middle finger to those who built and revered them. And i doubt anyone would be interested in doing anything without monetary gain from it.