I noticed this problem, as well as the templating for adding
configuration files to projects (faces-config.xml, persistence.xml, etc)
having the old XML schemas. It appears that Apache NetBeans has not
integrated, yet, with the Jakarta EE 9+ API.
JSF-EL and JSP-EL do not support code completion
I have issues with NetBeans JSP page parsers that have not been working. When
using Jakarta EE 9+ (using the jakarta, rather than the javax, packages) the
code completion/suggestions (ctrl+space) do not show any of my own code; none
of my CDI beans appear in the drop-down for auto-completing my