Damn, that sucks...sorry to hear about this shyt breh. Just go and spend time with your dad man.
One thing I really regret is when my paternal grandfather passed, I wasn't able to see him beforehand. I vowed not to let that happen again, and when my maternal grandfather had a stroke, I had just got back from a trip overseas and wasn't able to go see him, and ultimately he passed too...Really wished I could've had one last convo with both of those guys, as they were stand-up black men that were loved and respected in their families and communities. I really think being able to have those last conversations is extremely important, and while you may not like the decision, you both have the power to make the time spent great and fruitful. I urge you to sit down with him and have a conversation about his affairs and estate. Try to get it in legal writing. See if he has a life insurance policy, as the cost for a funeral can be quite expensive and that whole process can be very stressful, especially now with COVID deaths piling up. Parents passing can leave a lot on the childrens plate, and if you can get a head start on it in any way, man I urge you to do it. Ultimately tho, spend time doing his favorite things. If he's ready to go, send him out proper, and cherish the time you have left. Ask him about some of his favorite pieces of advice he'd want to pass on to grandkids, etc. and record the conversations with him. Watch his favorite shows and movies. If he's religious, read scripture and/or pray with him. Just anything man.
And just as importantly, stay healthy yourself man. Physically and mentally.