Actually they do. Whatever House in Congress files the contempt charge can order the Seargent of Arms to go get them, even at their house and bring them to the Capital jail. They can also fine a person per day. They threatened Barr with $20K a day this week.
FYI. Sergeant of Arms Paul D. Irving was elected during the Fraud’s illegal reign.
https://en.wikipedia.org/wiki/Sergeant_at_Arms_of_the_United_States_House_of_Representatives