They could also order assets frozen or something though (I think?) which I don't understand why they don't do.
TLDR; courts issue TRO (temporary restraining order), preliminary injunction, or permanent injunctions. Normally people comply. If the government does not comply then individuals can be found in civil contempt and the U.S. Marshals would enforce that. Civil contempt can't be pardoned.
There have been some TROs and injunctions issued but also some ignoring of them by the government (and also the supreme court has temporarily stayed at least one). I don't believe any contempt rulings (findings?) have been made, so not yet appropriate for the cops (Marshals).
[1] https://crsreports.congress.gov/product/pdf/LSB/LSB11271
Its a coup.
When half the people are fine with it and all branches of government are allied with them, there isn't much the rest of us can do except try to clean up the mess when we get a chance to.