Do you think that through this claim portal FTX will be willing to return everyone's money ?
They may be willing to, but I don't think that will happen. If they really had enough money to give back everyone what they owe, they wouldn't even be in this situation. Imho, people should be happy if they even get back 50% of what they had there prior to collapse.
By the way, FTX as all the data, KYC details and balances of everyone. Why not just restore the site and ask everyone to withdraw, if they are serious. Asking for such details, which they already have make no sense.
FTX filed for bankruptcy so there is certain procedure set. Another thing, what would be the point of restoring the exchange and just letting everyone withdraw their money willi-nilly if they don't have enough, which they obviously don't. I mean, how would that look like, if for example they have 7 billion USD while people try to withdraw 10 billion?
I remember NewZelanad's exchange cryptopia was closed and later they also asked their customer's to fill in forms to recover their funds. Nothing happened to date incipite people filling out the details and forms
Mt.Gox people are waiting for almost a decade to get their money back so don't expect that this thing with FTX will get solved anytime soon. Hopefully not as long as Mt.Gox, but you should be prepared to wait for years.