There are a number of tools to work on a site using your local computer as the host before pushing it to our platform, including DDEV, Acquia Dev Desktop, and many others. Sometimes a feature will not work on our platform for reasons that aren't always obvious.
- Check out our KB article on why something might work in one environment but not the other. Many of those could be applicable to the local environment as well.
- Drupal 9 currently requires the MySQL 5.6 driver on our platform. This is a known issue until we upgrade our platform to MySQL 5.7.
- It could be a that a file is ignored by your .gitignore file, and is not being pushed to your repository, and therefore not to the Acquia platform.
If you determine that none of those are the reasons, file a support ticket with us and give us as much detail about your local setup as possible, and we will help to understand what is going on.