He won't be released, tho, because Trump can't pardon the state charges, so unless the state of Minnesota goes back on their charges and pardons him as well, which they won't because the blowback and response from the public would be enormous just like it was during the protests and arguably worse, further igniting more tension.
This is nothing more than just a symbolic gesture to appease the racists, bigots, blue lives matter, law enforcement crowd, etc types of supporters he has and to continue to instill and encourage the idea that law enforcement should be given immunity and deemed unaccountable for their actions, as it relates to police brutality, among other things towards the citizens.
This doesn't do anything monumental as far as Chauvin walking out of the correctional facility as a free man. However, the fact that he would do such a thing is insulting, tone-deaf, and heartless to Black people but first and foremost to the man's family.