Try out the Wayfarer’s series! Becky Chambers is amazing. Her books are wholesome and character focused, and give you a great feel of what it would be like living in that setting.

I also really like Brandon Sanderson’s Cytoverse. It’s a fantastic adventure that will keep surpsing you, but it is YA, so be ready for a little silliness.

• Silo series by Hugh Howie
• Shatter Me by Tahereh Mafi (Young adult dystopian scifi)
• Across the Universe by Beth Revis (Young adult)
• Bird Box by Josh Malerman (apocalyptic thriller)
• Mistborn by Brandon Sanderson (fantasy, not scifi, but I’m digging up stuff from when I used to read more prolifically)
• Revelation Space series by Alastair Reynolds. I read this so long ago, and I feel like their were some great female characters, but I can’t remember if any were the protagonist. Each novel shifts around.

Parable of the Sower by Octavia Butler.

The Space Between Worlds vy Micaiah Johnson

A Half-Built Garden by Ruthanna Emrys

Pretty much anything by Octavia Butler.

Gideon the Ninth?

Takes like 5 chapters for it to find it’s feet but it’s lesbian necromancers and swordfighters in space with a very snarky point of veiw character.

It’s kind of more scifi fantasy but a good time.

The “Broken Earth” series by N.K Jemesin

First book

The Steerswoman series by Rosemary Kirstein, and the Merchant Princes series by Charles Stross—both series that may not seem like sci-fi at first, but become increasingly so as they progress.

Xenobiologist Kira Navárez in To Sleep In A Sea Of Stars might not win feminist awards, but I really liked her, the world building and the story. IIRC, it was relatively clean of overly sexist BS.

Echoing what others have already said here: The Expanse. The depth and quality of pretty much all the main characters is great. And there are several fantastic female characters who are strong, smart, and wonderfully written.

Pretty much anything by Cherie Priest, the Clockwork Century books are great!

Sassinak by Anne McCaffrey was pretty good.

Vatta’s War series by Elizabeth Moon is solid. Starts just a tad slow but ramps up quickly into action. I reread it every other year or two.

I thought YT was a well written character in Snow Crash. She took no shit from anyone.

Well my first recommendation was going to be Ancillary Justice, but there’s also Artemis by Andy Weir! It’s been a minute since I’ve read it but I don’t immediately recall it snacking of a “men writing women” feel.

Edit: Not super SciFi, but like steampunk fantasy maybe… Another option might be Mistborn by Brandon Sanderson.

Second Edit: Whatever you do DONT read Hyperion. Oof that one was one of the most ridiculous examples of “men writing women” I have read, although he notably grew as the series progressed.

Look, at this point I’m basically just “That guy who recommends the Luna books”, but this is yet another situation where they really are the right answer. Luna: New Moon is your starting point. The series is absolutely bursting at the seams with diverse and interesting female and non-binary characters. It also features some wonderfully atypical male characters who really play around with our understanding of what it means to perform masculinity. I am obsessed with Lucas Corta, iron fisted patriarch whose one weakness is for the beautiful young man who plays bossa nova for him, and I’m equally obsessed with his son Lucasino, the rich kid playboy who has fucked his way through his entire friendship circle, and loves makeup, androgynous clothes and baking.

Anyway, Luna: New Moon by Ian MacDonald. Give it a look.