I used to play a lot of fantasy sports. You'd generally pick a team of players (football, basketball, baseball, etc) from all the guys playing that day, and then as they compile stats (points/rebounds/steals/etc in basketball, passing yards/catches/touchdowns in football, just to name a few), you get a cumulative point total for your team.

But now there aren't any sports being played...
at least no sports being played by humans.

In the video above you'll see 2 virtual NBA games being simulated by a Playstation. No one is playing the characters, it's just a simulation. (My wife thinks this is the dumbest thing ever lol) On the various fantasy sports apps, before the games, you can choose lineups, just as if they were real games, and then watch along and root for "your" players. The website https://www.awesemo.com/ has been running both NBA and NFL simulations, and I've found it really fun to watch along with. And really, I don't see much of a difference in passively watching real players play games, or simulated players play games (my wife strongly disagrees and thinks this is the dumbest thing ever lol)

I'm not really into NASCAR, but today I stumbled upon eNASCAR/iRacing, and I might become a full-time fan. Actual NASCAR drivers race virtually against each other, using realistic multi-monitor simulators on their computers. The graphics of the simulation look really, really good.
Here's an example of what a race looks like (this was on FOX, and had real racing commentators) https://youtu.be/g75HghckIyY?t=474
And here's an example of what their racing setups look like: https://youtu.be/nHDH0pL_qBM

There are a ton more Esports/Virtual Sports out there. I've seen Virtual Golf (sometimes there are simulated players like Happy Gilmore and Shooter McGavin lol), Virtual Baseball in addition to various Virtual basketball and football simulations. And fantasy apps are venturing into Reality TV as well. You can create a "team" of players for the show Survivor, and you get points for things like Wins Immunity/Cries on camera/Catches Seafood.

And of course League of Legends has had fantasy sports for years now. Here's a post Jon wrote back in 2014 https://cheerfulghost.com/jdodson/posts/2043/league-of-legends-gets-the-fantasy-football-treatment

Almost all the Virtual/ESports contests are free to enter, and many allow multiple entries, so you can try different lineups and see how they score. It's a fun thing to fill the time with, and occasionally you can win 5-10 cents lol. My favorite app is FanDuel, which you can download from any app store, or go to this website https://www.fanduel.com/