Once you've submitted your SLO for approval, it is locked from further editing.
You can tell your SLOs are locked if you can't edit them or you see This SLO is awaiting observer approval when you navigate to your SLOs tab.
If you discover that you need to make changes, you can reach out to your Observer and request that they enable editing.
The observer will need to navigate to your SLO and click Enable Editing for Learner at the top of the page.
Once enabled, you can make changes to your SLO. Once changes are complete, you can resubmit for approval. For more detailed information on changes you can make, see our support article Adding and Managing SLOs.