Hi Hope,
The layers you added are elevation which are raster datastes and to filter World Elevation GMTED elevation ranges, you would need to use Map Algebra or Mask function.
Terrain ELevation Tinted Hillshade is a derived output from elevation and doesn't represnt raw elevation values. This layer is for suitable for visualization only.
Using Mask function, you can provide range (Min/Max values) to get filtered results from GMTED as shown below.
You can learn about raster functions here:
https://pro.arcgis.com/en/pro-app/latest/help/analysis/raster-functions/raster-functions-pane.htm
Mask function:
https://pro.arcgis.com/en/pro-app/latest/help/analysis/raster-functions/mask-function.htm
Hope that helps!