A new passport number comes with each replacement/renewal so I would suspect this is just security theater and you can upload any sample passport with the text changed. If they are insisting on the same exact passport again they could accept a fax of a random artwork and it would be more secure and just as permanent.

Which ones? The ones I've used use passport (and often photo holding passport) to enable certain features or raise limits, but they're not used for withdrawl. 2FA and email verification is.