Hi @Anonymous
We will take help of local variable to accomplish this. Please try the below steps:
1. On the "OnVisible" property of the screen where edit form is placed add the following line of code
UpdateContext({varFormMode:FormMode.View})
2.Next, the button which opens the form in edit mode should have the following code on the "OnSelect" property:
UpdateContext({varFormMode:FormMode.Edit})
3. finally, assign the variable to the DisplayMode property of form as mentioned below:

Please let me know if you face any problem & remember to give a 👍 and accept my solution as it will help others in the future.
Thanks