Winniewit I am so sorry to hear this but my friend's story might lift your spirits.
He is in his late 60s and a retired horticulturalist who now does gardening for people, including for me. He was diagnosed with oesophageal cancer 4 years ago and the tumour was too big for him to have surgery, so he had radiotherapy and chemo, and then they asked him if he'd like to take part in a trial.
He agreed to the trial and is now doing wonderfully well. He was soon back to gardening, lugging around large bags of compost and doing a lot of physical work. As I said above, it's been over 4 years and he is still going strong, although he does have to eat pureed foods. His wife makes sure he has a very nourishing and healthy diet.
He even caught Covid after one of his hospital visits but got through that too.
I wish your husband all the very best with his treatment, and a successful outcome.
for you.