If you require Proxy Settings for your Rasters when using Raster Manager, the Reality Mesh Proxy Server Settings now carries over these settings. You can find this option under:
Reality Mesh Attachments > Attach Reality Mesh > ProjectWise ContextShare Browser > Reality Data Settings
In Update 11, the Proxy Settings dialog will be moved to the User Preferences dialog and will act as a centralized source for all proxy settings within Power Platform.