The bank manager is not at fault.
He spoke about the governing laws in this regard.
Even though it was pandemic period, the rules cannot be relaxed just because she was suffering from terminal illness.
The rules made are for everyone hence the manager cannot be blamed for following the procedures of law.
Therefore no case is maintainable against the bank manager.
Besides, no third party can even think about suing the bank manager without knowing the facts or without having any evidence or without having any rights as an authorized person.