I am getting bored but I'll give you three that Pelosi should know about:
1) Exactly what intelligence of any security threat to the Capitol was received prior to J6 and, if there was, who was responsible for sharing this information, was it shared and with whom?
2) Were any requests for additional security for the Capitol were made prior to J6 by anyone, and if so, who, and what action was taken by any party?
3) Why did you ask for Chief Sund's resignation?
I don't expect that Pelosi will ever formally testify and answers to these questions might only partly exonerate Trump. But they could help fill a few gaps, which were ignored by the J6 circus act. They certainly might explain how the Capitol was so easily breeched.