This new client application doesn't requires JVM (Java Virtual Machine) and is intended for use on Apple Macs based on Intel or Apple Silicon.
New Client application is supported only with Big sur (11.x) and later.
If you want the Legacy Client, you can also switch to Legacy (Java-based) Client application. For more information, see Connect Tunnel on macOS.
This Legacy Client application requires JVM (Java Virtual Machine) and is intended for use on Apple Macs based on Intel or Apple Silicon.