It doesn't have to be bundled with the emulator.
The user could provide it.
Now, from Apple's point of view? That's old news, and the future is more compelling. Totally get it.
But it is stuff like this which keeps the iPad in the catagory of "toddlers toy" for me personally. It's really nice hardware too.
I own one. Was given to me. It really did end up being used as an excellent toddler toy!! The various touch games I found were really good and did promote some key skills.
I would have to check about ROM files!
Even if it doesn’t I imagine Apple would see this as promoting piracy of their software (the ROM and MacOS classic) and refuse to let it in under any reason they could try to justify.
Basically I don’t think it would ever get on the store period.