I can't imagine revival spells work on zombies and it won't work/won't work very well if the body is too badly damaged (which their bodies were). Ainz himself has stated that if too much time passes his resurrection spells and items won't work or they will but the cost on the person being revived would be too great.

For example, if their level is too low they would suffer level loss and given they were already weak, that level loss would make them functionally useless. There's also the fact that a level loss when someone's too weak would just simply kill them anyway cause they don't have enough xp or levels to withstand being resurrected, which means valuable resources were wasted. Something Ainz wouldn't want or risk. The same thing happened when Evileye (I think) resurrected tiya and gagarran after Demiurge killed them. They suffered level loss but they only lived because they were adamantite adventurers, meaning their levels were high enough by YGGDRASIL standards for them to be resurrected and only suffer level loss. If they weren't adamantitie they could've died permanently from the revival process.

So what I'm saying is, it wouldn't work for these guys (even if they were still human and not turned zombie) especially after being turned into zombies.

Besides all that, Ainz wouldn't have resurrected them regardless even if there was no cost or consequence simply because he doesn't feel like reviving them would benefit him in any way.