At the end of last week I released a number of Elytron Web versions to the wildfly-security repository but I don't see any in Maven Central:

https://central.sonatype.com/artifact/org.wildfly.security.elytron-web/elytron-web-parent/versions

https://repository.jboss.org/nexus/#browse/browse:wildfly-security:org%2Fwildfly%2Fsecurity%2Felytron-web%2Fbare-http-util%2F4.2.0.Alpha1

It looks like the sync task has been running but not reported any errors, also if I look at the batch of Maven Cetral Synchronization issues raised automatically none seem to relate to Elytron Web.