Could you try to explain what you are trying to do a little more or share some images? I know you are working with a button and a dropdown but not sure exactly what your goal is.
If your trying to change the status of the selected item in the dropdown list with a button click then yes that would be possible. When you select an item from a dropdown in Power Apps it is not only selecting that value but rather is a reference to that entire object/row in the list. So for example if you chose "John Doe" from a drop down list, you are not only selecting that string you are selecting the object that string belongs to which could include age, sex, height, weight, department, salary, etc. You can use that knowledge to edit using a button and the currently selected item in the dropdown menu. For example if you set the OnSelect of a button to:
Patch(YourSPList, ID = dropdown1.selected.ID, {age: 38, salary: 1,000,000, department: "admin"})
what would happen is Power Apps would look for the item in the SP list with the ID that matched the ID of the item chosen by dropdown1 and then would change whatever column value you passed in. (given that the value is a valid input based on SP column settings etc.)
