lsbom -f /Library/Apple/System/Library/Receipts/com.apple.pkg.RosettaUpdateAuto.bom
Or
ls /usr/libexec/rosetta
Via: https://apple.stackexchange.com/a/427996
Install snyk:
curl https://static.snyk.io/cli/latest/snyk-macos -o snyk
chmod +x ./snyk
./snyk
Does this work?
softwareupdate --install-rosetta