If any specific Apps causing the issue or missing then the Repair or Reset option is a handful solution. With the Fall Creators Update, Microsoft added an option to repair or Reset the windows apps to default setup. This is the recommended method to get back missing apps on windows 10. And scan Fix Broken Registry Errors Restart windows and check Apps are on normal State if not apply next solution.
Install System optimizer Tool Like CCleaner And run it for clean junk, Cache, Windows Error files, etc.
May with the latest updates windows download and install the missing, corrupted app. Also Check and install latest windows updates from settings -> update & security -> windows update -> check for updates.