Deploy Streamlit apps on GCP App Engine without Docker

I deployed the app to GCP APP engine standard environment (without docker), but when I open the url, it is stuck at “Please wait”. I tried all the solutions available online sample below:
streamlit run --server.port=8080 --server.address=0.0.0.0 --server.enableCORS=false --server.enableWebsocketCompression=false --server.enableXsrfProtection=false --server.headless=true

Any help would be appreciated.