Welcome to SailPoint developer community.
You can use VS Code extension for SailPoint IDN. You can export and import config.
IdentityNow Extensions for Visual Studio Code - IdentityNow (IDN) / IDN Show and Tell - SailPoint Developer Community Forum
You can use API as well.
Get Source using ID
GET {{baseUrl}}/sources/:id
Create source
POST {{baseUrl}}/sources
You can find V3 APIs here: V3 APIs | SailPoint Developer Community
Hope this helps
Thanks
Krish