Trials of Trump flag-waving protesters trying to disrupt the peaceful transfer of Presidential power is not at all comparable to criminal looters or rioters that you very mistakenly call “liberals.”
As to how many rioters in other cities were actually arrested and spent significant time in jail, that depends on local authorities, their capacity and willingness to prosecute and jail, and the available evidence.
Few blacks, after all, are ever so sure of their position in society that they would dare take pictures or videos of themselves breaking into Congress … or even just breaking a window and grabbing merchandise! Identifying individual looters or violent troublemakers with masks at night … is not so easy.
I don’t have any statistics but I would expect that there were relatively few rioters in other cities jailed for more than a few days or weeks, at least where lawyers were present and active. In truth, the names of arrested looters or petty criminals involved in street chaos and violence are usually quickly forgotten, or scattered in local databases very hard to trace.
Without solid evidence and testimony of arresting officers, charges of looting or disobeying orders to disburse, etc, are often eventually dropped entirely. Many cities simply have few resources and more serious criminal cases they must deal with. This is the unfortunate truth.
Of course it remains true that we have the world’s highest per capita rate of people in prison already, and that poor, angry, or drugged up black youth tend to fill our prisons far out of proportion to their numbers in the general population.