How to help grieving husband?

My husbands Nanna is dying in a hospice as we speak. If she makes it through the night I will be surprised as she is asleep the whole time and not eating or drinking. The drs said it will be hours that she has left.

My husband really retreats into his shell in times like this. He shuts down and won’t communicate and internalizes everything. I have asked him what he needs etc and he just keeps saying “you know how I am this is how I process things”. I’m the completely opposite.. I show my emotions, cry, tell him what I’d like him to for me etc so I’m having a hard time reading him.

If anyone else is like him, can you please give me any pointers on what you would need in a time of crisis? I just want to be there for him but I don’t really know what to do. Thanks everyone!