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Maybe you'er asking for this settings since you're not able to find it in the new UI, it has been removed from the settings since it is enabled by default now, so you do not need to make any changes on your form.
But the same as before if you edit the email template then empty fields will be shown, I would suggest you to add a new email notification and test it, you will notice that making any change on it empty fields are being hidden.
Do let us know if you have more questions, we will be glad to help you.