The user can choose one or more items in the multidropdown and only one item in the dropdown element.
Now I placed a button inside my app with the function to update the database record and insert (add/append) all items selected in the multidropdown. That works fine so far:
What you’ll want to do on the workflow is instead of choosing the Display of the Multidropdown, you’ll just select Multidropdown’d Value: Format as text.
It’ll then launch a new window where you set what to show for each line item, which in your case would look something like: This item's Display///Dropdown's Value
For the separator I believe a comma should work, and then back on the workflow expression, choose ‘Split by’ and chose comma again.