Other comment is correct, there are three variants. You can also click the Jacks or Better logo to see the game select menu. For more info, check out our guide:

https://guide.casinorpg.com/games/video-poker?s[]=video&s[]=poker

They do have Joker Poker and Deuces Wild; use the menu button on the VP machine to get to those. Not sure what other VP games you'd be able to get aside from those three without running into patents...