For reference in case anyone else wonders, FCM stands for Firebase Cloud Messaging.
donarb
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It looks like a bug. I noticed that too, but only the first time you create a project. To fix it, change the popup from SwiftUI to Storyboard, the Core Data checkbox will then be enabled. You can then check the Core Data checkbox, and make sure to change the Interface back to SwiftUI.
Actually I don't think it's a bug. If the Life Cycle is set to SwiftUI App, the Core Data checkbox is disabled. I'm assuming either it's not ready yet or it won't be enabled for some specific reason.
You can type in partial names into the panel that appears when you hit cmd-shift-O. Like if you want to edit the PenguinViewController.swift file, just type PVC, it should just select that file, then hit enter and you're there.