Maybe that’s of interest to you, too:
GitHub: jo-tools/ats-codesign-innosetup
WIth Docker installed on your macOS machine, you can build the windows installer right on your Mac. A “universal InnoSetup Script” is included (one script for all Windows Targets: Intel 32bit, Intel 64bit, ARM 64bit), all fully automated into a Xojo Post Build Script.
And if you have a CodeSign certificate for Windows (or an Azure Trusted Signing Account), that’s covered for, too - again: you can even build the codesigned InnoSetup installer on macOS (obviously also on Windows or Linux - the host machine doesn’t really matter as long as you can install Docker).
See also: https://forum.xojo.com/t/windows-code-signing-installer-creation-with-innosetup/