Techdows published a story that the latest Windows 10 insider build in the dev channel has added an alert if a new program registers in the Startup Apps section in Settings App.

Windows 10 alerts when Apps register to run on Startup

Microsoft made yet another useful addition to Windows 10 in insider builds in the dev channel after bringing dark mode support to Windows Search results and Meet now to the taskbar.  Windows 10 will now alert if any new app or program registers in the Startup Apps section in Settings App through a notification.

Windows 10 alerts when Apps register to run on Startup