Were there any game devs (or even studio employees) that lost their jobs for not bowing down to social justice endeavors during GG1?
The only one that
might qualify as "cancelled" was the dude from the game The Last Night. His game lost funding and last time I heard it was pretty much dead. The guy became pretty unlikable afterward so I don't care (found
this video while researching this, if anyone cares to know more than me).
I'd probably be disgruntled too if I was in Tim Soret's position. I'm certain that his game The Last Night was doomed in early development the moment it was announced at E3 2017 with game journos and their social media clique instantly marking it for destruction as blasphemous to sacred progressivism. The message was sent for the entire industry to either blindly follow or fear guilt by association, rendering the whole project too toxic to touch for investors and workers alike. The game surely would've been out by now had this malicious attack not happened.
Here's a reddit thread with lots of sources on the controversy as it was happening at the time.
More recently in 2021, Troy Leavitt was famously separated from his job as lead designer on Hogwarts Legacy because game journos (who already loathed the game anyway because of their hatred for Rowling) targeted him for discovered old Gamergate-related thought crime. We'll never for sure if he retired completely by his own volition or was "encouraged" to do so by his employers at Avalanche Software, but I'm inclined to believe that there was internal pressure and that he'd certainly still be working if he was never targeted as such.
While there are many individual game devs on social media who proudly use their real names and cite who they work for, I seriously doubt that you can find a single one who has openly expressed support for Gamergate while still being able to keep a job at a prominent video game studio. Recognize that pretty much all major tech and entertainment companies have HR and newfangled "DEI" departments with the expressed purpose of rooting out such heretics. Individual game devs who are sympathetic to Gamergate and current anti-woke sentiment are fully aware of this threat to their employment and are smart enough to express their discontent anonymously.
Separate from the matter of Gamergate supporters, but with a similar outcome, the Game Developers Conference (GDC) originally planned on giving Atari (and Chuck E. Cheese) founder Nolan Bushnell the Pioneer Award at the Game Developers Choice Awards (part of GDC 201

.
They then rescinded and shamed Bushnell, however, when Brianna Wu then wrongfully accused him of being an affront to Hasttag MeToo because he once ran hot tub meetings at Atari
in the 70s, a point that actual old female employees of Atari counter and protest to be deeply misconstrued and unfair to Bushnell
. I consider this to be
one of the greatest injustices in the video game industry for the past decade since the onset of Gamergate, and it annoys me immensely that this incident and Brianna Wu's role in it is largely forgotten, especially while Wu has nowadays been doing a "redemption tour" or sorts with many anti-woke figures acting friendly towards him rather than questioning him on the awful things he's done before.
EDIT:
Oh yeah, I forgot about the famous case of Oculus VR founder Palmer Luckey getting ousted from Facebook because it was discovered that he privately funded political billboard ads opposing Clinton in the upcoming 2016 presidential election. But this is another case of cancelling a guy who already made it and was immensely wealthy, which allowed him to just start a new big, successful company in the conservative-friendly defense industry rather than the ideologically-captured consumer tech industry he was effectively banished from. You might still see a game journo occasionally seethe about Luckey's continued success while working with the US military despised by Leftists.