Sci-fi's my favourite genre out of everything, but I almost never give 10s.
I've only ever given three films 10/10; all of them are sci-fi, but only one was in the last 10 years - Dune: Part One. The other two are Gattaca and 28 Days Later.
For TV shows it's similar - there are only three I've given 10/10 to, only one of those was in the last decade and it wasn't sci-fi.
I've given more novels max ratings, but they were all written decades ago (four by Jack Vance, three by Asimov, one by Joe Haldeman, and one by John Scalzi).
I haven't given any video games 10/10.
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Changing the criteria slightly to 'best sci-fi xxxxxx in the last 10 years', then I'd say:
Films:
- Dune: Part One
- Edge of Tomorrow
- Blade Runner 2049
- Furiosa
- Mad Max: Fury Road
- Oblivion
TV Series:
- Severance
- Mr. Robot
- Love, Death & Robots
- Black Mirror
- For All Mankind
Novels:
- Beacon 23
- The Collapsing Empire
- Sea of Rust
- Sand
Video Games:
- Mirror's Edge: Catalyst
- Control
- Inside
- The Last of Us
- Resident Evil 2 Remake
- Resident Evil 4 Remake
- Cyberpunk 2077
- The Surge
- Horizon Zero Dawn