Sign Windows Installer with innoSetup

https://docs.microsoft.com/en-us/windows/win32/seccrypto/signtool

Create self signed certificate (PTX) in one minute with Delphi:

http://docwiki.embarcadero.com/RADStudio/Sydney/en/Creating_a_Certificate_File

Deploy your app on Microsoft Store:

http://docwiki.embarcadero.com/RADStudio/Sydney/en/Preparing_a_Windows_Application_for_appx_Package_Distribution

Sign your installer with your self-signed certificate:

https://revolution.screenstepslive.com/s/revolution/m/10695/l/563371-signing-installers-you-create-with-inno-setup

Create a verified certificate:

https://docs.microsoft.com/it-it/mem/configmgr/mdm/deploy-use/create-pfx-certificate-profiles