Why does my Visual Studio Professional not show the target platform .Net 8.0?

Environment:
Visual Studio Professional 2022 Version 17.10.2

Run latest updates for Visual Studio.
Install runtime and SDK for .Net 8.0.

Expect, that the Visual Studio shows the Framework 8.0 as an option in target platform for an existing C# dll project.

dotnet --info
.NET SDK:
 Version:           8.0.301
OS runtime:
 OS Name:     Windows
 OS Version:  10.0.22631
.NET SDKs installed:
  2.1.526 [C:Program Filesdotnetsdk]
  3.1.426 [C:Program Filesdotnetsdk]
  5.0.302 [C:Program Filesdotnetsdk]
  8.0.300 [C:Program Filesdotnetsdk]
  8.0.301 [C:Program Filesdotnetsdk]
.NET runtimes installed:
  ... old versions starting with 2.1.30
  Microsoft.AspNetCore.App 8.0.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
  Microsoft.AspNetCore.App 8.0.6 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
  Microsoft.NETCore.App 8.0.5 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
  Microsoft.NETCore.App 8.0.6 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
  Microsoft.WindowsDesktop.App 8.0.5 [C:Program FilesdotnetsharedMicrosoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 8.0.6 [C:Program FilesdotnetsharedMicrosoft.WindowsDesktop.App]
Environment variables:
  Not set
global.json file:
  Not found