Kitty ping!
I can't help the kitty. But add me to your list. I have five.
I had a cat who had feline leukemia, and we tried to keep him alive, with numerous trips to the vet. But, in the end, the disease just overwhelmed him. He had such a hard time. If I had another cat with the same diagnosis, then I would just have it put away immediately. Not being dismissive, but just realistic.
You are a very kind to have picked up the kitten and looked after it. At least the little creature is being fed and looked after. It is not out there frantically searching for a home. If it does have to be euthenised, this is not a cruel act - they pass away immediately without suffering.
Please add me to your kitty ping list! Thanks