The file (.tif and .xm) from this USGS site and download n10_susc.zip (574 MB) from Attached Files list:
https://www.sciencebase.gov/catalog/item/65ccea5bd34ef4b119cb3bac
Use n10_ak.tif and n10_ak.tif.xml. The other files n10_conus.tif and n10_conus.tif.xml works fine.
RasterLayer rl = new RasterLayer(filePath); await rl.LoadAsync();esriMap.Map.OperationalLayers.Add(rl);
// rl.SpatialReference = null even though n10_ak.tif.xml specifies "NAD_1983_Alaska_Albers" within Esri tag.
Visual Studio 2022 v.17.14.5 Output window has this (I could not catch with try/catch)
ArcGIS Maps SDK: LayerViewState Error: RasterLayer
Internal error.