What I can not see in your workflow is that you also set the environment name. I set the environment name via an input.

Here is an example.

name: Build and Deploy

on:
  workflow_dispatch:
    inputs:
      environment:
        type: choice
        description: Choose environment
        options:
        - stage
        - production
jobs:
  deploy:
    environment: ${{inputs.environment}}
    runs-on: ubuntu-latest
    steps:
    # ..