Implication of update to JAVA 11

Hello

As preparation for update to Axelor AOS-7/AOP-6, we have updated Java version from 8 to 11.

The AOP 6.0 migration guide mentions the removal of the JAXB module from Java 11, but does not make it clear whether this module is essential to the building/running of Axelor. Does anyone 1) know if this module is essential, and 2) if so, then how to go about installing it. We get our java packages from the Alma Linux repositories, and have already successfully switched to Java 11 and Tomcat 9.