I can't recommend this author enough. Project Hail Mary and The Martian are amazing works of science fiction. Project Hail Mary is actually amazing as an audiobook.
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If you liked explorative / conceptual Sci Fi, more for the thought exercise than anything else:
- Exhalation by Ted Chiang. A collection of scifi short stories that are quite thought provoking. Some sprinklings of religion in some of them.
- The Illustrated Man by Ray Bradbury. A classic, also a short story collection. Golden age scifi.
- Project Hieroglyph. A collection of authors that partnered with Phd students to write short stories based on their research papers. Great concept with great stories.
If you liked Andy Weir's focus on engineering/building:
- Bobiverse series by Dennis E. Taylor. A man uploads himself into a Von Neummann probe and replicates himself to play Factorio among the stars.
- Destiny's Crucible by Olan Thorensen. MC gets sent to an alternate earth in a technological past, and attempts to re-introduce modern technology and build industry.