There are 2 possibilities, one is that the government will petition the court for an en banc hearing. The hearing that ruled against 2257 only consisted of 3 judges an en banc hearing would consist of the entire court. The government may do this as a matter of form (pro forma) on it’s way to step two which is to request the Supreme Court to rule.
It isn’t likely that either tactic would be successful at this point, but you never know.
Currently the ruling does NOT apply to anyone in California or anyplace but the 6th District but like I pointed out before, that may change.