The January 6 mob was given due trial even though the charges were way heavier than gang membership. So your point is...?
Correct. It's perfectly normal to be kept in solitary confinement for years before being given a trial.
Unfortunately, it is. Kalief Browder was kept largely in solitary for more than two years for allegedly stealing a backpack.
If you want to help with the fight to get these sorts of egregious treatments (especially pre-trial) recognized as violations of the 6th and 8th amendments, join to the fight to win back the courts from conservatives.