I personally prefer it as a different moon. It makes sense to me that the planet would have different moons, and those could have different biomes, so I enjoy it as worldbuilding. That’s why I really want to give it a matching title to the Sanctuary Moon. (I’m still unclear whether the planet is called Endor, or the forest moon is called Endor, even after looking it up on Wookieepedia, and I prefer it that way.) Each planet having its own biome feels quintessentially Star-Wars-y to me.

Maybe the Estuary Moon?