how do I find Four player chess and variants on my tablet
Yup. Open your web browser. Type chess.com. Open it. In the side bar, click on play, go to fourth option named '4 player and variants' and click on modern or anyone you prefer to create a challenge. It will take a bit of time to find opponent but you will get them. Here is the link : https://www.chess.com/variants
Happy playing 🎉