Thank you for your reply! I am a Qt developer.
I found that there is no access to this feature in titleBar(In the maximized hover panel, there is only a full-screen option) and menuBar(In the view submenu, there is no corresponding feature menu item, which appears to differ from the automatic addition rules for the dictation function and emoji symbols in the edit submenu.).
I hope to support this capability.
Sfirst
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I have found the cause of the problem. If the movable flag in NSWindow is set to NO, it will cause this feature to be unusable.