Does anyone know if there is a way to upgrade to Director current release after the site upgrade to 2402 cu2 has been done? I think it is not possible to get to the wizard offering these steps again. https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/2402-ltsr/director/instal[…]l-and-configure/independent-release-of-director-for-ltsr.html

Check out the CR documentation page. There are more details about the manual upgrade steps than in the LTSR docu https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/director/install-and-configure/independent-release-of-director-for-ltsr