What is the legal ruling regarding what was mentioned in the details of the question concerning inheritance and the division of rents, and what must be done about that?

Perhaps your mother and siblings' rejection of your entitlement to the rent of the two apartments is based on them not being registered in your name, or that your building of them was a gift from you to your father, while it is not permissible for the giver to retract their gift after the recipient has taken possession of it. Therefore, you must prove your ownership of the two apartments with the help of your siblings and neighbors, and clarify that allowing your mother to have the rent was due to her need, and that not registering them in your name was out of respect for your father, not with the intention of a gift. We advise you to always be dutiful to your mother, and we remind you that such cases should be brought before the Sharia courts to investigate the facts and reconcile disputes.