In theory, yes. More free time could mean more time to work on games, it also could happen as someone said before that it could be another excuse to not work, or maybe that dev is sick or have sick people to attend. Sometimes having "free time" from work just mean having more "work time" in the house.
I'm a dev and having more time to work on my game doesn't really mean more content, it mostly means that I will have to stand everyone else being at home complaining about how much it sucks and why everything the other one knows about the virus is wrong, because apparently everyone here are infectologist from day to night and they know everything about it (please kill me) but I'm trying my best to work on my game because it's my hobbie and it's the thing I want to do the most. In this two days I did more than in two regular days.
Now, as a player it could mean way more free time to play games, people doesn't put excuses to enjoy (just to work), people will catch up with the games they once played, pick new games, etc. Some people will chill & netflix the whole time while others will play porn games the whole time.