Yeah, Sumerian religions have had a massive impact on world religions given Sumeria’s location in Mesopotamia and being the home to the first permanent settlements in the Eurasian continent. But as you say there are places they didn’t reach.

Though it’s particularly interesting what spreads and how. Enki was one of the most important gods to Mesopotamia, and that makes sense, but he didn’t spread nearly as far as aspects of Inanna who was regularly reimagined as she found her way to new cultures such as as Cybele in Rome.