I think Season 1 of Disco was originally filmed with the idea it could be broadcast on regular television, if needed, which they did do on CBS in 2020.While that is true for broadcast shows, streaming series don't have that excuse. Without being locked into an hour long format, counting commercials, an episode can be 50-65 minutes and not have an issue.
That was actually an issue I had with multiple DISCO season 1 episodes, because a couple of them were only around 35 minutes. (They did get better at that in season 2, at least.)