To find the games that are iPad compatible, you can use the Game Features filter within the search bar.
Search for a topic and then click on the dropdown menu under the Game Features section. From the dropdown menu, simply select the 'Plays on iPad' option. This action will automatically update the selection of games that are displayed related to your selected topic.
Also, every game provides additional information when you click the game tile. Look for the iPad icon on the game tile to ensure you are assigning a game that is iPad compatible.
Here is an article that will provide you with information about overall iPad compatibility.