Hi @Ano Acco ,
As per my research, I'm afraid there is no such out-of-the-box setting to label entire containers automatically. I would suggest that you can post a user feedback here: https://feedbackportal.microsoft.com/feedback/forum/5ad50ce6-8a83-ec11-8d21-0022482fa693. Microsoft will consider prompting it if it is highly voted.
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