Go to the AWS Management console and open the IAM Identity Center.
Go to Settings and Enable Automatic provisioning.
Copy the values of SCIM endpoint and Access token.
Go to Okta and select the tab Provisioning. Click on Configure API Integration.
Paste the two copied values and click on Test API Credentials. When you copy the URL, make sure there is no / at the end or link validation in Okta will fail. Click on Save.
In the Provisioning tab make sure that To App is selected. In the top right corner click on Edit and select Enable for Create, Update and Deactivate Users. Click on Save.