The Thunderbolt NVM on LVFS has been last updated in January, and has version 28:
https://fwupd.org/lvfs/device/4eeb9d07-a96c-56d6-92d3-4a23ee7a6e4a

While the Dell website was updated in June and has version 33:
https://www.dell.com/support/home/us/en/19/drivers/driversdetails?driverId=CV9CP

Please provide the updated version on LVFS as well.