DOJ is working as hard as the Jan. 6 committee, maybe harder, and could use more help from them

[Fiendish Thingy]

9. They haven't had 18 months, they've had barely six months

SCOTUS ruled on Trump’s privilege claims in mid January, and only since then has the bulk of the incriminating physical evidence, including Eastman’s memos, been released from the archives.

DOJ convened a Grand Jury in February, and has been calling witness connected to the fraudulent electors scheme, the STS rally VIP section, and others in Trump’s inner circle since then.

Pence and Meadows top aides have only testified to the committee in the past few months.

As the OP stated, DOJ doesn’t have access yet to the hundreds of interview transcripts obtained by the committee.