My timeline:
May 27, 2023: Application Submitted
June 22, 2023: Acknowledgement of Receipt (AOR)
June 22, 2023: Request for new foreign (USA) police certificate
July 2, 2023: Submitted police certificate via webform
July 4, 2023: IRCC email confirms receipt of police certificate
July 4, 2023: Fingerprints requested
July 10, 2023: Fingerprints submitted
July 26, 2023: Fingerprints received (no notification or update in tracker until July 29).
July 27, 2023: Background completed (no notification or update in tracker until July 29).