Husband is depressed and anxious - help please!

Hi all, this forum is wonderful and the collective wisdom here is amazing. I wonder if you can help me again?
My H has suffered from low grade depression most of his life. He is on medication.
Lately things have taken a real down turn (again) and anxiety is also in the mix now. Covid has played a role here - he is terrified of catching it and doesn't want to do much outside of the house, despite being fully vaccinated.
One of our children lives abroad and despite it being possible, he refuses to travel.
He actually said yesterday that he "hates his life".
All my suggestions are met with complete rejection.
He is in therapy and his medication is monitored by a psychiatrist.
He has so much that is good in his life but he simply cannot (will not?) see it.
I am honestly at the end of my rope here.
He is such a misery to live with, he doesn't provide any emotional warmth or support (but he is fine on the practical side, and does a lot around the house so I guess that is something to be grateful for).
He doesn't acknowledge the depth of the issue nor the impact it has on me and the rest of the family.
I'd really welcome suggestions - what can I do to help him and us?
Thank you!