Oh, this is completely different in my country and in Islamic countries, where the wife receives only 1/8 of the inheritance, and the rest is divided among the children.
Obviously, there are significant differences in inheritance laws depending on the country. Therefore, to avoid problems, it is best (as @Lucius mentioned) for the account owner to appoint a legal heir on Binance, to avoid disputes among the heirs over the deceased's account.
In my country the legally married wife gets everything especially if the children are minors. If the married is not recognised by law, she gets nothing. Extended families might benefit if they are included in the will. Including a next of kin in Binance documentation is important to avoid disagreements. A legal practitioner will give better advice regarding documents that should be presented by the claimant and the tax-related issues.