Service Level Credits are not showing up in ArcGIS Pro when a Web Map Tile Service (WMTS) is added as a basemap within a project from Portal for ArcGIS.

Additional Information

Workaround

If the WMTS is added directly into Portal NOT as a basemap, the Service Level Credits is available.

1. Obtain a WMTS. For this testing, WMTS by the National Oceanic and Atmospheric Administration (NOAA) is utilized: gis.charttools.noaa.gov/arcgis/rest/services/MarineChart_Services/NOAACharts/MapServer/WMTS
2. Navigate to your federated portal (11.1) and click Content.
3. Click New Item > URL > Paste the WMTS URL and click Next > click Next again > Give it a name and click Next again > and wait for it to get added to your portal.
4. Once it is added to your portal successfully, navigate to the item details of this freshly added WMTS Service and edit the Credits (Attribution), for example: This is a test for Service Level Credits.
5. Navigate to ArcGIS Pro (3.x) and log in into the correct Portal > Navigate to Catalog > Portal and look for WMTS service and add it to the ArcGIS Pro project.
6. Once this is added, click the Service Layer Credits button and it shows up as expected. This can then also be tested in New Layout > Dynamic Text > Service Layer Credits and it shows up as expected.

NOTE: For clarity, screenshots of this defect are attached as a guide.

Screenshot C = 'ServiceLayerExpected_Portal'

Screenshot D = 'InMapSLC_Expected_Portal'

Steps to Reproduce