.NET Framework 4.6.2 is inbox component in Windows 10 version 1607 and Server 2016, so it will get support until 2026 for these
they didn't set specific date for 4.6.2-4.8 versions because it depends on the parent OS end of support
https://learn.microsoft.com/en-us/lifecycle/products/microsoft-net-framework
e.g. .NET 4.8 will be supported on Win10 1809 LTSC until 2029, but on Win10 21H2 regular Enterprise until 2024