The hospital has just called me and told me that mom is failing quickly. The hospital cannot get hold of my brother.

https://www.agingcare.com/questions/how-do-i-notify-my-brother-that-mom-has-been-moved-to-a-personal-care-home-when-he-will-not-talk-to-459614.htm

This is an on going thing with your brother. If the hospital cannot get hold of him you are going to need to let it go. He has made a choice not to keep in touch. Yes, Mom now is dying and you want him there for her but it may not happen. You need to do what you need to do for you. Try to contact brother if you want. Make the call, tell him Mom is dying or leave a message, then its his decision. You can't make him care. He will have to live with what he has done, not you. Again, you do what you need to for you. My brothers never went out of their way for my very loving mother. Her family was everything to her. I said nothing because they were old enough to make their own decisions. They have to live with that, I don't.

Let it go. Contact your brother now.

Your brother has made his choice. We can see this from your other post. The hospital has attempted to get in touch with him.
There are no death bed movie scenes in real life, or none that I have ever witnessed. Others have attempted to reach your brother and have informed you that he cannot be reached. Be at peace and concentrate now on the passing of your Mom, celebrate her life as much as you are able. Be at peace with her passing. Take care of what business must be taken care of. If you plan services text him a message as to where, when they will be. And that is the end of that. Let him get on with the life he has chosen. I wish you peace, and send my sympathy to you all.

There's another aspect in that there's friction between you and your brother, and he's apparently not very cooperative.  Don't give him a chance to hassle you after your mother is gone.   Call him, leave him a message, or text him.  Then it's up to him to respond and he can't add another level of his complaints by accusing you of not notifying him.  

This is especially important if you're the Personal Rep or Executrix of Mom's estate.

Thank you for all of your support. Because of Covid-19 I cannot even bee with mom but I talk to her several times a day and the staff are excellent. They have promised that mom will not be alone.

I called my brother and he yelled, screamed and cursed me them hung up. I have done everything I can and I am not finished. The funeral will be very simple as mom wants instant cremation and buried beside my dad.

Butterfly, I am so sorry that you are going through this and then your brother behaves so atrociously.

May you and your mom have peace and comfort during this difficult transition.

Great big warm hug for you!

I have an older brother. He has not visited in Years. I consider myself an only child. He has not been involved with my parents since he was 18. He is 68 divorced 3 times. He has a daughter about 30 that we’ve never seen. My mother reached out when she was a young child, but her mother never responded.

My parents are nice, decent people. But they would not support his teenage drug and alcohol use. They sent him to rehab twice with no success. Bottom line you can’t make someone be involved if they don’t want to.

Butterfly, be proud of yourself that you've made the effort; that's all you can do.   I would document the call though (date, time, and generally what your brother said).  

ReallyReal said it beautifully on wishing you and your mother peace and comfort during these challenging times.

I wish you and your mother peace and comfort in this difficult time.