Yes and No! and that is not a criticism.
YANBU wanting it - whether he is in a place to acknowledge or even respond is another matter.
I had a similar annus 2 yrs horribilis, parent died, dick head left me, one of my DCs was seriously ill, severely bullied at work, sibling got cancer, niece came to live with us ( I seriously only do boys now!),other parent was awful to be around - grief and other sib was a pain in the unsupportive arse!!
All I can say is, I had no concept of how bad it was when my parent died - it was .....................
I survived on a day to day basis, if it did not involve walking, sleeping, eating and existing it pretty well got left behind. My world was very insular and as much as I think I wanted a hug / Ex to remember to buy me a b day present from the DCs - 4 and 6, I realised that if I showed any weakness/need I felt my iron will and self control would snap and I would breakdown. Any act of kindness - caused me to cry.
Not saying that is what is going on with your DP but it might be.
I did stop drinking,realised about 2 weeks after funeral, that I was coming home and drinking every night. All alcohol out the house and physically felt better. It was very easy and insidious to not realise one glass was now 3.
It will improve - took about 15 months and I can not tell yu what changed but suddenly not everything was black.
You sound lovely and supportive - he is lucky to have you, do not give up on him yet.