Thanks for this tip! To clarify, this would only be necessary in an installation scenario such as this when the company is doing managed installation - for an end user using the iScreensaver Installer, it would automatically trigger the Rosetta installation during the installation process.
For other notes about Rosetta, please also see this: Disabling Rosetta awareness messages for iScreensaver on macOS 26 Tahoe and 27 Golden Gate using MDM