By default, you will see 6 emojis in Dream League Live (multiplayer).
If you earn or purchase any additional emojis, you'll need to enter the "Emoji Selection" menu to select them.
You can only use 6 pre-selected emojis in a multiplayer match at any one time, so you'll need to swap out existing emojis to use new ones.
To access the Emoji Selection screen, please click the "My Profile" button (little player silhouette in the top right corner on the Main Menu) and click the smiley face button shown on your manager's avatar / profile picture.
To disable emojis and stop them appearing in multiplayer, from the Main Menu, click the gear icon (settings) and then in the Game section, turn the Multiplayer Chat option to OFF.