Sci-fi shows, but really out of context:
Farscape
Stargate SG-1
Agents of SHIELD
Star Trek: The Next Generation
Battlestar Galactica
The X-Files
The Expanse
Fringe
Lost
Firefly
seen from United States

seen from United States
seen from United States

seen from United Kingdom

seen from United States
seen from Russia

seen from United States
seen from Netherlands
seen from United States
seen from Armenia

seen from Poland

seen from Russia

seen from United States
seen from Canada
seen from United States
seen from Netherlands

seen from Canada

seen from Yemen

seen from United Kingdom

seen from United States
Sci-fi shows, but really out of context:
Farscape
Stargate SG-1
Agents of SHIELD
Star Trek: The Next Generation
Battlestar Galactica
The X-Files
The Expanse
Fringe
Lost
Firefly
Farscape (1999-2003)
Watching Killjoys for the first time: Johnny Dangerously
Star Trek: Discovery "Battle at the Binary Stars" (2017)
The first episode of Stargate SG-1 premiered on July 27, 1997. The series was a spin-off of the movie Stargate (1994). Until it was beat by Supernatural, SG-1 was the longest running American live action Science Fiction show (that title was held by Doctor Who in the UK). Peter DeLuise got involved with the show through writing, directing, producing and making cameo appearances. For the series Richard Dean Anderaon took over the Kurt Russell role of Jack O'Neill, Michael Shanks the James Spader role of Daniel Jackson, and Elizabeth Hoffman the Viveca Lindfors role of Catherine Langford. In both the film and series Erick Avari played Kasuf, and Alex Cruz played Skaara. The first episode also featured Amanda Tapping as Samantha Carter, Christopher Judge as Teal'c, Don S Davis as George Hammond, Jay Acovone as Charles Kawalsky, Vaitiare Hirshon as Sha're/Amaunet, Robert Wisden as Samuels, Peter Williams as Apophis, Brent Stait as Louis Ferretti, Gary Jones as Walter Harriman, and Alexis Cruz as Skaara/Klorel. The series was about a group of soldiers and scientists who traveled through Stargates to other worlds. ("Children of the Gods", Stargate SG-1, Sci-Fi TV Event)
Favorite "Space Opera" or similar TV Sci fi series of the 2010s?
The Expanse
Star Trek: Discovery
Killjoys
Dark Matter
The Orville
For All Mankind
Lost in Space (2018 version)
Pandora
Another Life
Nightflyers (TV series)
Something Else (put in tags)
Show results/ I haven't seen any of these
I decided "The Mandalorian" didn't quite count.
Edit: I also have similar polls for the 1960s/70s/80s , for the 1990s, and for the 2000s.