The Dune Spice Wars games, it's a strategy game similar to Northgard. I have a bit a love hate relationship with this one but it may be what you're looking for.
Also I think funcom has an upcoming Dune game. I don't really know what to expect but I've put literally thousands of hours into the conan exiles rp scene so I'm pretty excited about this game.
https://www.youtube.com/watch?v=eDyXIXyAZq0
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