Hi @JimmyWork ,
The key point of your issue is the form's mode.
Do you want to create a new record?
If so ,please set your form's DefaultMode: New.
Then, the form's data will all beacome blank.
What's more, edit form's mode is Edit by default.
When your form's mode is Edit, your form will be used to edit an existing record.
The form will display the record's data by default. You also need to set the form's Item to the item that you want to edit, or else the form will display "No Item to display".
Please note that, after you submit the form(no matter newform/edit form), the form's mode will change back to Edit.
Here's a doc about form's Mode in details for your reference:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/controls/control-form-detail
Best regards,
