@Eddy86 I'm not sure what snap maps is, but you'll probably have better luck making this request in ID Software and Bethesda community help forum.
Or are you saying the feature is available in platforms other than Stadia?
They are like custom maps. I've seen survival plays in YouTube. Cool to slay with friends..
As far as I know, it was in PC and PS4 (at least) but not in Stadia and Switch.
I don't see Bethesda helping stadia now that belongs to Xbox xD