I am also experiencing the missing BIOS and Firmware issue after updating VCRM to 7.3.
Downgrading 7.3 to 7.2 results in the following error: The specified repository, <server name>, is invalid or not reachable. However, BIOS/Firmware versions show in VCA.
Running SMH 7.3 and VCA 7.3 results in lack of BIOS/Firmware versions.