Hello @nullbio1 , Welcome to forums!
I did some research and it seems that, at least for now, Unreal Engine 5.7 doesn’t include the Starter Content. I also couldn’t find any official note from Epic saying whether this is temporary or if they plan to keep it that way, but there’s a simple workaround to get the Starter Content into 5.7.
You just need to create a project in an earlier version, like Unreal 5.6, and enable the Starter Content when you create it.
Once inside that project, right-click the StarterContent folder and choose Migrate
A window will pop up ,click OK
then select the Content folder of your Unreal 5.7 project as the destination.
That’s it. After migrating, you should have the full Starter Content available in your 5.7 project.
Hope it helps!