The FBI investigation into Harry Bosch and Honey Chandler in Bosch: Legacy was still ongoing at the end of season 2. However, the upcoming third season has a lot to unpack, with Chandler's run for district attorney and the expansion of the Bosch-verse with the Renee Ballard crossover all set to feature alongside other important plot points. It could be too much to contend with, and it might be wise to put the FBI's case on the back burner for now, and revisit it in a future season.