continuous deployment django database

Using the App platform for a Wagtail(django) project, I struggle to continuously deploy my database.

My project’s code is updated upon deployment. I can then enter the data from my server. Yet, the DB component isn’t updated.

My emote DB can run the project with either sqlite3 or postgres. While sqlite is simpler for local considerations, I switched to postgres for a continuous deployment.

I added a Db postgres component. But it doesn’t display the deployment modifications. Idem, after I run ‘python manage.py migrate’ command in my server console.

I found plenty of information but no script that is guaranteed to work and is up-to-date.

I’d highly appreciated if you can you advise on the best practice, a barebones example that I can follow step-by-step that would set me on my way.