Nowhere. Without full OCS or AGA compatibility it would have been yet another fiasco for Amiga Technologies. It was the custom chips which made Commodore-Amiga successful.
For a mobile device, it ECS/AGA compatibility wouldn't have been needed, at least not initially. If they had gotten a base model out and released a decent SDK, we would have many ports as we see to day for OS4/MOS/AROS. With a jump to the more modern DragonBall MX, EUAE integration would have been option.
On the other hand Amiga Technologies never had resources to enhance Amiga in any way. They had only one employee: Petro Tschytschenko. Amiga Technologies was always "dead" company with few ideas with even fewer resources.
No more so then Hyperion's two people, now just Evert, have done with OS4. Except Petro would have demanded more code and all of it being on time, or else.
Dammy