Kevin Chant offers some insights for us:
One of the options within the SQL database Projects extension is that you can publish your project to another SQL Server database. Of course, this is only for one database.
So, what do you do if you want to update multiple databases with one project? Well one option is to create a dacpac from your project and use that dacpac to update multiple databases.
You have a couple of options if you wish to do this.
Read on for some helpful tips.