I'm not sure but I think this may be the same bluejay who's picture I posted a couple of weeks ago when he appeared to be bald (from molting). https://365project.org/gardencat/this-and-that/2020-08-07
I'm hoping that it is and that his head feathers are growing back. He still doesn't have as distinctive and fully formed a crest as I'm used to seeing but he dos seem to be coming back from looking like a vulture.