I believe the judge doesn’t think further indictments are likely:

Fulton County Superior Court Judge Robert McBurney ordered the partial release of the report in February but declined to immediately release the panel’s recommendations on who should or should not be prosecuted. The judge said at the time that he wanted to protect people’s due process rights.

McBurney said in a new order filed Aug. 28 that the due process concerns were moot since a regular grand jury has indicted Trump and 18 other people under the state’s anti-racketeering law.

If he truly believes that not releasing the names of the unindicted protects their due process rights, then it only makes sense the reason he considers the issue moot now is because they will remain unindicted.