Can I use a script to restore multiple SQL databases from .bak files?
You can use

sqlmigration - Start-SqlServerMigration.ps1

This script provides the ability to migrate databases using detach/copy/attach or backup/restore. SQL Server logins, including passwords, SID and database/server roles can also be migrated. In addition, job server objects can be migrated and server configuration settings can be exported or migrated. This script works with named instances, clusters and SQL Express.


Restore Genie - it has both PowerShell and t-SQL version.


I have used both and they are life savers. Highly recommend to test them first. First one is the one that will help in your situation.