Would anybody like to look into making Lazarus's cross-platform native code setups using InstallAware?
A single project would compile into Windows, Linux (aarch64 and AMD64), and macOS (Intel and Apple Silicon) targets.
Most installer work is OS specific, and, in the case of FPC/lazarus even the file lists to install are, since there are *nix and windows specific packages, and similarly due to Lazarus' widgetsets.
You can try, but I don't really expect that much from it, nor that it will match the current inno setups.