Well they tried to have some R’s but they refused to participate, sort of a self fulfilling prophecy
Pelosi nixed the Republicans Kevin McCarty appointed and McCain and Kinzinger were appointed by Pelosi. This is a violation House protocol.
The GOP wanted Jim Jordan and one other Patriotic Republican, but Pelosi nixed them..
So because the Rs knew it was futile they didn’t try for more.
So they wanted to participate, but Pelosi wouldn’t let them.
So GOP did the right thing which exposed the committee as a witch hunt.