In the Plesk Control Panel, only ASP.NET versions 4.8 or 3.5.30729.4926 may be visible. However, ASP.NET Core is already installed on the server and available for use by all customers. Unlike ASP.NET 4.8/3.5, there is no need to switch to ASP.NET Core as it is already available by default. It's important to note that the option to switch between ASP.NET versions is completely separate from .NET Core.