It's not exactly like Star Trek to be sure, but it's possible you might enjoy continuum. Definitely deals with moral issues, but it's not space based, or as futuristic
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There's so much modern Trek at this point I don't even know if that's necessary.
Anyway, I'd say I see a ton of overlap between liking Trek and liking The Expanse, although it's more political and less "alien of the week diplomacy". Still, it goes places, give it a look.
Black mirror, especially the early seasons
I liked the "Lost in Space" series, tbh... Exploring is key lost in space on alien planets.
What about star Trek books? There's hundreds of them.