Artificat released on Nexus but not syncing with Maven central

I have this artifact which is released on Nexus:

<dependency>
 <groupId>tech.streamsoft</groupId>
 <artifactId>dragon</artifactId>
 <version>0.0.1-alpha.3</version>
</dependency>

And its accessible from a Maven project if I specifically give the Nexus repository URL.

Its been some time now but it is not available on Maven central. There’s nothing for me to click on or do in the Nexus repository manager to progress it further. Is there some problem with the project or something that I have to do to get it to sync with Maven central?

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Rich