The investigation shows that BarCodeControl and BarCodeGeneratorControl exists and works well. They weren’t removed in 20.8 version. However, you should use BarCodeGeneratorControl instead of BarCodeControl because BarCodeControl is based on obsolete BarcodeBuilder which will be removed in next releases.
In some situations BarCodeControl can disappear from Visual Studio toolbox. This happens when application .NET target version is lower from .NET library version.
If you drag and drop Aspose.BarCode.dll on Toolbox from net48 folder and use host application with net 2.0 or lower target, the control could be disappeared. In this case for net 2.0 application you should use Aspose.BarCode.dll from net20 folder, but net 4.8 applications can use Aspose.BarCode.dll from any folder from net20 (net30-net48).
So just drag and drop correct Aspose.BarCode.dll (same or lower .Net version) on VS Toolbox and everything will work well.