probably depends on if they were armed, threatened anyone, destroyed property, etc
https://www.nbcnews.com/politics/congress/live-blog/electoral-college-certification-updates-n1252864/ncrd1253128#blogHeader
Demonstrators who stormed U.S. Capitol face potential federal charges
Demonstrators who stormed the U.S. Capitol amid pro-Trump protests could face potential legal exposure to federal crimes. Here is an explainer of possible charges.
Trespassing: A federal petty misdemeanor that applies to persons who enter or remain in any building they are not licensed to enter.
Entering a restricted government building: This misdemeanor applies to anyone who knowingly enters a restricted government building or engages in disorderly conduct near a restricted government building that impedes government business.
Entering a restricted government building with a weapon or causing injury: This is a felony that applies to persons who violate the above misdemeanor and do so either with a firearm or deadly weapon or with further actions that result in serious bodily injury.
https://www.nbcnews.com/politics/congress/live-blog/electoral-college-certification-updates-n1252864/ncrd1253128#blogHeader
Physical damage to government property: a misdemeanor if someone damages government property up to $1,000 and a felony for over $1,000.
Misdemeanors carry fines and up to a year in prison. The felony counts listed carry maximum prison terms of 10 years.