The December 2022 release of MDM - Reference 360 includes the following important notices.
Deprecated support for export and import model version 1 REST APIs
Effective in the December 2022 release, the export and import model version 1 REST APIs are deprecated. Informatica intends to drop support for these APIs in a future release.
You can use the export and import model version 2 APIs to export and import assets from source to target organizations.