Hi @Van Le,
Currently there is no such function to custom sharepoint folder create form. And I feel regretful to inform you that it turns out to be a by-design one. It is highly recommended that you can rasie a new ticket in feedback and I will vote for you. Many features of our current products are designed and upgraded based on customers’ feedback. With requirements like this increase, the problem may well be released in the future. Thanks for your understanding.
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