Don't rush to rewrite a stable app just because it's on .NET Framework 4.6.2 – it's still secure, reliable, and supported. But do plan a migration to modern .NET for new features and long-term agility.
For enterprises deploying via ClickOnce, 4.6.2 was a godsend. It introduced support for for manifest downloads, finally allowing ClickOnce deployments to work with servers that had disabled SSL3 and TLS 1.0. It also added better logging for deployment failures. microsoft .net framework v4.6.2
Unlike versions 4.5.2, 4.6, and 4.6.1 (which reached end-of-life in 2022), version 4.6.2 is still supported as it is often considered a "component" of the operating system it is installed on. Don't rush to rewrite a stable app just because it's on