Couldn't have anything to do with the fact that Intel literally has a more power-efficient SoC? I wouldn't be surprised to see more 13" AMD laptops with the 7nm die shrink next generation but even then I don't see AMD being more efficient than Intel 10nm.
well I made two claims but
1: Because Intel 14nm was more efficient than AMD 12nm. i'm not make this prediction with high confidence.
2: Independant of the competition 7nm should offer insane enough battery life in a 13" form factor to be "good enough".