What to get for someone who has everything?

D • Mama of 2,lost an angel, waiting on number 4💘💓💘 married-blessed💓
My hubby pretty much has everything he ever wanted now. We live in a huge ass house he has some niice cars, he's living his dream and his dream job he has me and our children but he has stomach cancer and 3 weeks before fathers day he will have his surgery and will obviously be pretty done after it for quite a while, so I've been thinking about what to get him for fathers day.
I thought materalistic stuff like another car or idk a watch are just basic and I would like to give/buy/make him something nice and personal with our kids, the oldest is 5 the other one is 7 months old, I wanted to include our boy in Germany we're adopting (he's 4) so does anyone have any ideas?