What you want to do is put the Bixfix installer and its support files into /tmp/bigfixInstaller/ using a Composer package so the BigFix Installer Package is installed to there. Then have a postinstall script which runs the BigFix installer.
I recommend looking in the bigfix documentation about the methods supported to deploy software on these Operating systems as this is more about bigfix deployment method than XDR installation coverage. . If bigfix supports msiexec for Windows deployment you should be fine using the steps in our documentation[1], the same applies for Linux[2] with rpm/dpkg and MacOS[3] with a unified configuration profile for MDMs similar as jamf process.