From the Spend Dynamics home screen, you will see in the top left corner if you have Out of Pocket expenses that require your attention. Click that section to open the items.
When you're ready to submit your expense(s) you have two options:
To submit one at a time, click the green arrow out to the right of the expense.
To submit all expenses shown, click Submit All at the top.
This will alert your supervisor that they have expenses submitted by you which need to be approved. (This can take up to a day to display for your supervisor. It may not be immediate.)