Update your map basemap with the latest

[BernSzukalski]

As announced previously, several of Esri’s raster basemaps moved to mature support in July 2021. Newly introduced ArcGIS Online layer status capabilities make it easy to identify whether your maps are using any of these deprecated basemaps and other deprecated layers. 

If your web map is referencing one of these raster basemaps, you should notice that it is marked as deprecated in the item details (example below).

For more details, see Update basemap in your web maps.