Signature missing after installing the app using binarycreator

User is having installer signing issues when creating an installer for their signed app:

"
before running binarycreator the signature of the app is this:
spctl -a -t exec -vvv ./MyCompany\ Test\ Worker\ x.x.x.app
./MyCompany Test Worker x.x.x.app: accepted
source=Notarized Developer ID
origin=Developer ID Application: MyCompany, Inc (xxxxx)

this is how I created the installer:
binarycreator --offline-only -c config/config.xml -p packages TestWorker123_Build123_mac.app
where packages folder contains MyCompany\ Test\ Worker\ x.x.x.app

I ran the installer to install the app and this is the result I got:
MyCompany@MyCompanys-Mac-2 pt123 % spctl -a -t exec -vvv /Applications/MyCompany\ Test\ Worker\ x.x.x/MyCompany\ Test\ Worker\ x.x.x.app
/Applications/MyCompany Test Worker x.x.x/MyCompany Test Worker x.x.x.app: rejected
source=no usable signature
"

Using:

https://doc.qt.io/qtinstallerframework/ifw-tools.html#summary-of-binarycreator-parameters
"-s or --sign identity Only available on macOS. Allows specifying a code signing identity to be used for signing the generated app bundle."

does not help.