The ruling on increasing the amount of zakat al-fitr with the intention of voluntary charity

Question:
He says: Honorable Shaykh, may Allah grant you success, if a person is required to give zakat al-fitr in the amount of approximately six kilograms, but he gives ten kilograms with the intention of increasing it to be voluntary charity, is this permissible? Because some people say that this increase is a bid'ah (religious innovation)?

Answer:
No, it is a bid'ah if you believe that it is zakat al-fitr and that the sa' (a dry measure of about 3 kg) is not sufficient. However, if you give it as an increase in voluntary charity and a donation, there is nothing wrong with it.