You need to embed the check-in solution into the communication solution.

Box 1: Power Apps Web Studio

Scenario: The check-in solution must continue to function if there are internet issues. If the self-service kiosks are not available, staff must be able to use the check-in solution from within their communication solution.

PowerApps Studio is a browser application used to edit your apps. PowerApps Studio includes a drag-and-drop canvas in the center of the screen and a screen or object list pane on the left. Properties, Rules, and Advanced Properties for selected screens or controls are displayed in the right pane.

Box 2: in a tab

You can customize the Teams experience by adding Power Apps canvas apps to your channels in Teams using the PowerApps tab.