IIRC, either Barr's notification letter or summary letter stated there were no more indictments or any sealed indictments.

People were speculating that sealed indictments were from Mueller. No one ever knew who the indictments were from. Now we know they were from grand juries other than Mueller's (assuming the reporting is correct and we don't have reason to doubt that at this point).

However, we did learn this week that Mueller's grand jury is still working. We haven't gotten an explanation of what that means since Mueller's team has finished work.

The Country is all of ours, and we pay the bills.

It’s public information that a court has sealed indictments... including their numbers.

What you can’t find is which prosecutor(s) asked for them. Someone just looked at the number from a court that Mueller was using and imagined (to be charitable) that they must be Mueller’s

Mueller grand jury 'continuing robustly,' prosecutor says
The revelation — while laced with uncertainty — indicates that the ongoing cases Mueller handed off could still feature significant developments.
March 27, 2019
https://www.politico.com/story/2019/03/27/mueller-grand-jury-1238861

"I worked with the prosecutor [Goodhand] in this matter,” said Gene Rossi, a former assistant U.S. attorney in Virginia. “He uses his words very carefully. The use of 'robustly' is not bluster or gratuitous. That word strongly suggests that the handoffs from Robert Mueller's office are alive and kicking and that the Washington U.S. Attorney's Office could be another troubling front for the president and the White House."

In his letter,
http://www.documentcloud.org/documents/5784098-AGLetter32919.html
Barr talks about about redacting the Mueller report for "material that could affect other ongoing matters, including those that the Special Counsel has referred to other Department offices."

As well, there were 40 FBI agents working for/with Mueller. I doubt some of the things they were investigating but were incomplete got tossed in the waste basket.

Mueller reportedly farmed a lot out to make it more difficult for Trump's AG to kill cases off. I suspect Barr is already underway examining what he can do there ...

Along with the ability to finally read the full Mueller Report (no Summary) guess we all wait patiently to see which Office received custody of those Sealed Indictments.