usr/local/tomcat/webapps/ROOT/WEB-INF folder remains empty from GITHub Actions Java Web App deploy

I am Deploying a Simple Java Web App in Azure App Service using GitHub Actions workflow file.
App Service is running on Java11/Tomcat 9.0 stack.

Java Code > https://github.com/BasujitaBhattacharya/JavaWebApp.

The artefacts generated after the mvn clean install has the classes and lib folder generated inside the snapshot war.
However, after the deploy action when my webapp failed to function as expected,
I connected to the container via ssh and found that WEB-INF folder is empty.

The folder structure should be WEB-INF\classes\com\valeykey\frontend.
The class files must be inside this directory structure.

Any insights will be really helpful, thanks in advance.

Below is my GH Actions workflow file >

name: Build and deploy WAR app to Azure Web App - JavaWebAppfromPortal

name: Build and deploy JAR app to Azure Web App

env:
JAVA_VERSION: '11' # set this to the Java version to use
DISTRIBUTION: microsoft # set this to the Java distribution
AZURE_WEBAPP_PACKAGE_PATH : ./AppService/JavaWebApp

on:
push:
branches: [ "main" ]
workflow_dispatch:

permissions:
contents: read

jobs:
build:
runs-on: ubuntu-latest

steps:
- uses: actions/checkout@v3

- name: Set up Java version
uses: actions/setup-java@v3.0.0
with:
java-version: ${{ env.JAVA_VERSION }}
distribution: ${{ env.DISTRIBUTION }}
cache: 'maven'

- name: Build with Maven
run: mvn clean install
working-directory: ${{ env.AZURE_WEBAPP_PACKAGE_PATH }}

- name: Upload artifact for deployment job
uses: actions/upload-artifact@v3
with:
name: java-app
path: '${{ env.AZURE_WEBAPP_PACKAGE_PATH }}/target/*.war'

deploy:
permissions:
contents: none
runs-on: ubuntu-latest
needs: build
environment:
name: 'Development'
url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}

steps:
- name: Download artifact from build job
uses: actions/download-artifact@v3
with:
name: java-app
- run: ls

- name: Deploy to Azure Web App
id: deploy-to-webapp
uses: azure/webapps-deploy@v2
with:
app-name: ${{ secrets.APP_SERVICE_NAME }}
publish-profile: ${{ secrets.AZURE_WEBAPP_PUBLISH_PROFILE }}
package: '*.war'