My nana and nani is no more and my mom, my aunt and and my mama is legal hier

Unlike Hindu law, where coparceners have a right to the family property from birth, Muslim law follows the principle of Nemo Est Haeres Viventis, i.e. nobody can become an heir to a living person. Thus, the right to the family property arises only after the death of the one holding the property

Your aunt and mama can gift their share to your mother. It is not mandatory that a Gift under the Muslim Law (Hiba) be registered.