Link to the Microsoft docs:
Troubleshoot app installation issues documentation: https://docs.microsoft.com/en-us/mem/intune/apps/troubleshoot-app-install
Intune app installation error reference: https://docs.microsoft.com/en-us/mem/intune/apps/app-install-error-codes
Deep dive:
Applications do not appear as Available in the Intune Company Portal app on Windows 10: https://docs.microsoft.com/en-us/troubleshoot/mem/intune/apps-appear-unavailable
Go on https://portal.manage.microsoft.com and connect with needed user, select needed computer
