There is the whole issue of young Lily being Latina in appearance, while Snow and Charming aren’t, but at least hair color would be explained by Snow’s dark hair.
Definitely a problem, I agree. As is the question of how Lily got to our world in the first place and why Snowing never made mention of another baby. However,all of this can be magicked away with some plot devices and exposition. So…
1) The Latina Problem. Lily is a shapeshifter who, for reasons unknown, decided that she would “play” at being Latina while in this ream. (real answer: A and E didn’t cast a Latina actress to play Adult! Lily for….reasons)
2) The Realm Problem. Easy. Plot device #67623768. A random door brought Ingrid, something brought Cruella and Ursula. There is a never ending supply of magic freaking beans, apparently. This one is the easiest one.
3) The Snowing Problem. Memory erasure. Again, easily solved with some hand waving.