I'd "expect" them to be the lie flat ones from the configuration. But possibly best to check with Etihad call centre.

Admittedly, I've not flown this route, but the seat map is same as 2 class MAN-AUH.

The best way to imagine the seat layout is two staggered seats in AC and HK, and staggered singles and pairs in the middle. A and K are snug and private next to the window. C and H you virtually fall out sideways into the aisle which is between C/D and G/H. D&G are equally open, adjacent to the aisle and not close to each other. For a couple E&F are perfect. If not available, perhaps two either side of the aisle is ok. I've been lucky and got 9K every time so I wouldn't know for sure.

Not sure about the seat layout you posted. I did a dummy booking and both EY41 and EY48 are as I describe above. Maybe your dates are different.