Unfortunately there is no way to change this behaviour. You will either need to use the format button or hit SHIFT+ENTER. I would recommend communicating with your users to educate them on the two options.
However, you could submit feedback to Microsoft and see if they can add an option at https://feedbackportal.microsoft.com/feedback/forum/ad198462-1c1c-ec11-b6e7-0022481f8472
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