You can try searching with Finder if you can't see Samsung Kids anywhere on the home or app screens.

If it appears in the search results, you can open it and follow the onscreen instructions to add it to the app screen and complete the initial setup.

If you can't find it using Finder, try opening the Quick Settings panel to look for the Samsung Kids toggle. This toggle might be hidden by default; therefore, tap the three-vertical-dot Menu button > Edit button to look for it and drag it to the Quick Settings panel.

Next, you can tap the Samsung Kids toggle to download the Samsung Kids.

Once you finish installing, you will see the initial setup screen. Make sure you check the Add Samsung Kids to the Apps screen option and follow the onscreen instructions to complete setting up Samsung Kids to have its icon placed on the app screen.