So i made a server and when setting it up thought why not put maewings on the island but there are not in the dino list to take out add or replace for another dino. Just wondering if this is just a accident or are maewings only allowed on genesis 2? 

Those options were made before WildCard began requiring subscribed DLC checks in their ToS for modders.

Some, but not all, Genesis 2 dinos are not allowable / spawnable through spawners in other maps. You can get around by using mods such as Simple Spawners, as they allow "Dino BP" import.

It's a gray area, similar to how Video Game emulators are legal, just their roms aren't.

ah ok. well good to know. ill just have t ouse the simple spawners mod then.  T

so simple spawners do not have gen 2 dino either due to devkit not being released. 

You can import the dino in SS though. Just need the BP path. It's the same method you would use to add Mod dinos.

yea seen they actually give  you bp path with simple spawners just not sure how to do it. and wanted to replace a dino instead of just adding in maewing. 

You can always just put the entires in per spawner via the Expert tab.

https://www.survivalservers.com/wiki/index.php?title=ARK_Dino_Spawn_Configurations