RadNotification seemingly does not have focus trap
Am i missing something?
Most Telerik components provide support for Section 508 and WCAG 2.0-2.1 compliance, but you can customize the app to make it comply with other standards. Since the Notification does almost the same as a RadWindow, you can try the approach from your other forum thread where we have discussed the Window component: focus trap inside RadWindow
The only difference is that Notification renders a different class name, so you will need to change the selector to target ".RadNotification" class.