Quick Look is written as "QuickLook"

[Dave Nicolson]

It's a minor issue, but Apple consistently uses Quick Look.

QuickLook is only used for frameworks, bundle IDs, etc.

[Eir Nym]

This is a plugin for QuickLook, which is a name of the server and framework used in macOS. Thus, in my opinion word has been used correctly.

[Dave Nicolson]

Apple doesn't use framework names in titles and normal copy unless explicitly stylized that way (eg. SwiftUI).

Apple uses "Quick Look" in Xcode:

Some other frameworks that follow this convention:
IntentsUI.framework "Intents Extension"
IntentsUI.framework "Intents UI Extension"
FileProvider.framework "File Provider Extension"

[Eir Nym]

Thanks, I was sure in what I've said including third party plugins. May be they changed their mind or I looked mostly from technical point of view.