Hi @DB_365
Per my test, I could still edit the Title column by click "Details" with files but folders not. This could be by design.
You could send feedback to Microsoft SharePoint Feedback.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.