Try if you can remember exactly what you did when you came home from the funeral.
All the ordinary things, like hanging up your outdoor clothes, taking shoes off, going to the toilet, changing out of your suitable funeral wear and into something more comfortable.
Retrace your steps through the house, checking shelves, occasional tables etc. where you might, just might, have put the ring down. Did your phone ring just after you came home, and if so, where did you sit or stand while talking to the caller?
I have sometimes found things this way.
If it does not work, empty and clean the fridge!
I know it sounds ridiculous, but lost items have been known to turn up in my fridge. Another thing is that you can clean the fridge without really thinking about what you are doing, so you may suddenly remember where you put your ring.
If not at least the fridge is clean!
I hope you find your ring.
I recently panicked because I had "lost" my wedding ring. It turned up in the finger tip of my gardening gloves!