Lions can’t breed with tigers?
Zebras, donkeys and horses can’t interbreed?
Polar and Grizzly bears can’t breed?
Wolves, coyotes and dogs can’t interbreed?
IIRC, the Russians tried some experiments with human, gorilla and chimpanzee embryos without success. It was, as I remember, back in the 40s or 50s so, today, who knows.
Homo Sapiens, Homo Neanderthalensis and Homo Denisova are much closer genetically than gorillas or chimps. Currently in science, they are not sure if Neanderthalensis and Denisova are a separate species or just a sub-species. There are very specific genetic differences. Is it enough difference to classify them as a separate species? That has arguments both ways. Neanderthalensis contributed genes for blond and red hair and light skin to modern man.
And let’s not forget Bos taurus and Bos Indicus breeding with each other; and with bison.
Or white tails with mule deer.
And ducks are a so promiscuous between species, that it’s ludicrous.