The Kingdom of France 1791?
Monaco in 1793? Prussia in 1794?
When do you want to start this? Maybe 20th century instead? The October Revolution in 1917, Poland 1932, Denmark 1933?
Oh you're talking LGBT protected class discrimination for employment! Pennsylvania, 1975, Wisconsin 1982?
Maybe you're talking about Bostock v. Clayton County(2020) which got to the SCOTUS because a private corporation, in 2019, fired an employee for being gay. That's how it got there, a private company not respecting LGBT rights.
So maybe you mean the courts? When was the first case in lgbt's people's favour? One, Inc. v. Olesen 1958. Nineteen fifty eight.
So yeah, probably government. Feel free to move the goalposts around if you want. I'm pretty confident on this on wherever you decide to place them