The entire grand jury process is extremely protected as the 5th amendment requires. Fullstop.
Unfortunately, we have a long and painful history with the Trump-era Main Justice system, intentionally leaking information to satiate the MAGA base and tamp-down demands for reform and accountability. For seven years various Trump officials have claimed to be working to bring accountability. None has been delivered.
Also unfortunately, the pattern of bread and circuses is repeating. The Dept of Justice leaked a letter to The Federalist, in order to affirm their performance.