If you believe in Buddhism, hope for a miracle or let your father die peacefully, and have a happy life in the future, even get rid of suffering, please purify your heart, lead your family to recite the Tripitaka for him for 9 times, and return it to him and all suffering beings (as a gift). There should be unexpected beauty and induction. I just rescued a friend who was dying of liver cancer, and led him and his family to say nothing at the last minute, that is, they kept chanting "Amitabha Namo" loudly. He left peacefully, and the strong smell of disinfectant in the ward completely disappeared in that 10 minute. It was a thick and comfortable sandalwood fragrance. There were more than a dozen people present, all stunned. From then on, I began to learn Buddhism. Whether he goes or not, you should recite the scriptures and Buddha, which is beneficial and harmless.
In addition, in this extraordinary period, you must not kill because you give him supplements and entertain guests. It is a good idea to set them free.
I hope this answer can help you.